Question: Which animated television series was slated for inclusion in the video game Cartoon Network Backlot Party and first aired in 2011?

Context articles: List of Clarence episodes
Steven Universe
List of Adventure Time episodes
Cartoon Network Racing
Out of Jimmy's Head
The Amazing World of Gumball
List of Dexter's Laboratory episodes
Mixels
Cartoon Network: Backlot Party
Storm Hawks

"Clarence" is an American animated television series created by Skyler Page for Cartoon Network.
 Page, a former Cartoon Network storyboard artist for the series "Adventure Time" and storyboard revisionist for "Secret Mountain Fort Awesome", developed the series at Cartoon Network Studios in 2012 as part of their animated short development initiative.
 The series revolves around a young boy named Clarence, who is optimistic about everything.
 The network initially commissioned twelve 15-minute episodes, and aired the pilot following the 2014 "Hall of Game Awards" show on February 17, 2014.
Steven Universe is an American animated television series created by Rebecca Sugar for Cartoon Network.
 It is the coming-of-age story of a young boy named Steven Universe (voiced by Zach Callison), who lives in the fictional town of Beach City with the "Crystal Gems" – Pearl (Deedee Magno), Garnet (Estelle), and Amethyst (Michaela Dietz), three magical humanoid aliens.
 Steven, who is half-Gem, goes on adventures with his friends and helps the Gems protect the world from their own kind.
 It premiered on November 4, 2013 as Cartoon Network's first animated series to be solely created by a woman.
 Books, comics and a video game based on the series have also been released.
 When the series is in a hiatus, there would usually be multiple episodes airing after it concluded.
 The theme of the series is love and family as it is based on the creator's brother, Steven Sugar.
"Adventure Time" is an American animated television series created by Pendleton Ward for Cartoon Network.
 The series follows the adventures of Finn (voiced by Jeremy Shada), a human boy, and his best friend and adoptive brother Jake (voiced by John DiMaggio), a dog with magical powers to change shape and grow and shrink at will.
 Finn and Jake live in the post-apocalyptic Land of Ooo.
 Throughout the series, they interact with the show's other main characters: Princess Bubblegum (voiced by Hynden Walch), the sovereign of the Candy Kingdom; the Ice King (voiced by Tom Kenny), a demented but largely misunderstood ice wizard; Marceline the Vampire Queen (voiced by Olivia Olson), a thousand-year-old vampire and rock music enthusiast; Lumpy Space Princess (voiced by Ward), a melodramatic and immature princess made out of "irradiated stardust"; BMO (voiced by Niki Yang), a sentient video game console-shaped robot that lives with Finn and Jake; and Flame Princess (voiced by Jessica DiCicco), a flame elemental and ruler of the Fire Kingdom.
 The pilot first aired in 2007, and it was later re-aired on the incubator series "Random!
 Cartoons" on Nicktoons Network.
 The pilot eventually leaked onto the internet and became a cult hit on YouTube.
 After Nickelodeon declined to turn the short into a full-fledged show, Cartoon Network purchased the rights, and "Adventure Time" launched as a series on April 5, 2010.
Cartoon Network Racing is a racing video game developed by Eutechnyx (PS2) and Firebrand Games (Nintendo DS version) and published by The Game Factory on December 4, 2006, in North America, and on February 9, 2007, in Europe.
 The gameplay is similar to Nintendo's 2003 game "", but the characters and racetracks are from Cartoon Network's original animated television series.
 The six series featured are "Courage the Cowardly Dog", "Cow and Chicken", "Dexter's Laboratory", "I Am Weasel", "Johnny Bravo", and "The Powerpuff Girls".
Out of Jimmy's Head (abbreviated as OOJH), is an American live-action/animated television series.
 It was advertised as the first Cartoon Network series in this genre, even though "Big Bag" was what took credit, while also including some animated segments.
 Based on the first live-action/animated original channel movie "Re-Animated", that was aired on December 8, 2006, it is produced by Cartoon Network Studios and Brookwell McNamara Entertainment (the latter known for shows such as "Even Stevens" and "That's So Raven").
 It was created by Tim McKeon and Adam Pava, who were originally the writers for "Foster's Home for Imaginary Friends" and "The Life and Times of Juniper Lee", but also the creators of "Weighty Decisions" short on Cartoon Network's "Sunday Pants" anthology series.
The Amazing World of Gumball (also known simply as just Gumball) is a British-American animated television series created by Ben Bocquelet for Cartoon Network.
 Produced primarily by Cartoon Network Development Studio Europe, it first aired on May 3, 2011.
 The series revolves around the lives of 12-year-old Gumball Watterson, a blue cat, and his best friend—adoptive brother, goldfish Darwin, who attend middle school in the fictional city of Elmore.
 They frequently find themselves involved in various shenanigans around the city, during which time they interact with Gumball's family members—sister Anais and parents Nicole and Richard—and an extended supporting cast of characters.
"Dexter's Laboratory" is an American animated television series created by Genndy Tartakovsky for Cartoon Network.
 Initially debuting on February 26, 1995, as a seven-minute "World Premiere Toons" pilot, it was expanded into a full series after gaining network approval.
 The first season, which consists of 13 episodes divided into three segments each, premiered on TNT on March 24, 1996, and TBS on April 14, 1996 and later Cartoon Network on April 28.
 A second season of 39 episodes followed in 1997.
 In this season, Allison Moore, the voice actor for Dee Dee, was replaced by Kathryn Cressida.
 "Last but Not Beast", the second-season finale, was originally supposed to conclude the series in 1998.
 However, Tartakovsky directed a television movie titled "" which aired on Cartoon Network on December 10, 1999.
 He left the series after the movie, focusing on his other projects, "Samurai Jack" and "".
Mixels was a 2014 comedy animated television series that aired on Cartoon Network, co-produced by The Lego Group and Cartoon Network Studios.
 The series first aired on February 12, 2014 with a new episode of "Teen Titans Go!
".
 The series revolves around the Mixels, small creatures that can mix and combine with one another in creative and unpredictable storylines.
 Although previous Lego series, such as "" and "Legends of Chima" use CGI animation, "Mixels" made use of Toon Boom Harmony software, which is animated at Atomic Cartoons, Inc., before later being animated traditionally at Digital eMation, Inc., Big Star Entertainment, Inc., and Saerom Animation, Inc..
Cartoon Network Backlot Party is a cancelled crossover party video game for Nintendo 3DS and Wii, based on various Cartoon Network series.
 It was also the sequel to "Cartoon Network Block Party" for the Game Boy Advance.
 Shows such as "The Amazing World of Gumball", "Courage the Cowardly Dog", "Ed, Edd n Eddy", "Regular Show", "Adventure Time", "The Grim Adventures of Billy and Mandy", "The Powerpuff Girls", "Cow and Chicken", and "Dexter’s Laboratory" were represented in the game.
 The game release was reportedly scheduled for 2015, being the final announced release for the Wii, although it was cancelled for unknown reasons.
Storm Hawks is a Canadian animated television series created by Asaph "Ace" Fipke and was produced by Nerd Corps Entertainment in association with Cartoon Network and YTV.
 It premiered on Cartoon Network in the United States on May 25, 2007.
 It began airing on YTV in Canada on September 8, 2007.
 It started to air on Cartoon Network in the UK on August 6, 2007.
 In Poland, it started to air on Cartoon Network on November 10, 2007.
 Internationally, it first aired on ABC1 in Australia on February 26, 2008 and on Hero in the Philippines on March 12, 2008.
 The show also started airing in Singapore on okto, Bulgaria, Turkey, Portugal and Romania in 2008.
 Disney XD began airing the series on February 28, 2011.
 In 2016 it returned to Canada on Family Chrgd.