Question: This superhero film written and directed by James Gunn stars an actress who appeared in what 2015 film?

Context paragraphs:
Pom Klementieff: Pom Klementieff (born c. 1987) is a French actress.  She was trained at the Cours Florent drama school in Paris and has appeared in such films as "Loup" (2009), "Sleepless Night" (2011) and "Hacker's Game" (2015).  She plays the role of Mantis in the film "Guardians of the Galaxy Vol.  2" (2017) and will appear in the same role in the film "" (2018).

James Gunn: James Gunn (born August 5) is an American screenwriter, director, producer, novelist, actor, and musician.  He started his career as a screenwriter in the mid-1990s, writing the scripts for "Tromeo and Juliet" (1996), "Scooby-Doo" (2002) and its sequel "" (2004), and the 2004 version of "Dawn of the Dead".  He then started working also as a director, starting with "Slither" (2006).  He subsequently wrote and directed the web series "James Gunn's PG Porn", and the superhero films "Super" (2010), "Guardians of the Galaxy" (2014) and "Guardians of the Galaxy Vol.  2" (2017).

Tania Saulnier: Tania Saulnier (born March 5, 1982) is a Canadian actress, perhaps best known for her role in the film "Slither".  Saulnier was born in Vancouver, British Columbia, Canada.  Once a competitive dancer, and motor-sport enthusiast Tania's first notable acting role came in 1998 with a small part as Marcey Bennett, in one episode of "Cold Squad".  From there she moved on to various projects, one of which was playing Taylor Langford in the short-lived Nickelodeon series "Caitlin's Way", for which she was nominated for a 2001 Leo Award as Best Performance in a Youth or Children's Program or Series.  She went on to act in small roles on various television shows, such as "Smallville", and in the "Supernatural" episode "Scarecrow".  This was followed by her supporting role in James Gunn's horror film "Slither" as Kylie Strutemyer.  Saulnier appeared in two films, "The Invisible" and "In the Name of the King: A Dungeon Siege Tale".

Guardians of the Galaxy (film): Guardians of the Galaxy (retroactively referred to as Guardians of the Galaxy Vol.  1) is a 2014 American superhero film based on the Marvel Comics superhero team of the same name, produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures.  It is the tenth film in the Marvel Cinematic Universe.  The film was directed by James Gunn, who wrote the screenplay with Nicole Perlman, and features an ensemble cast including Chris Pratt, Zoe Saldana, Dave Bautista, Vin Diesel, Bradley Cooper, Lee Pace, Michael Rooker, Karen Gillan, Djimon Hounsou, John C. Reilly, Glenn Close, and Benicio del Toro.  In "Guardians of the Galaxy", Peter Quill forms an uneasy alliance with a group of extraterrestrial misfits who are fleeing after stealing a powerful artifact.

Slither (2006 film): Slither is a 2006 American science fiction-comedy horror film written and directed by James Gunn in his directoral debut, and starring Nathan Fillion, Elizabeth Banks, Gregg Henry, and Michael Rooker.  The film was produced by Paul Brooks and Eric Newman.  The film has similar themes and concepts as the 1986 B-movie "Night of the Creeps".

The Belko Experiment: The Belko Experiment is a 2016 American horror film directed by Greg McLean and written by James Gunn.  The film stars John Gallagher Jr., Tony Goldwyn, Adria Arjona, and Melonie Diaz.  Filming began on June 1, 2015, in Bogotá, Colombia.  The film premiered at the 2016 Toronto International Film Festival on September 10, 2016 and was released in the United States on March 17, 2017, by Blumhouse Tilt and Orion Pictures.  The film received mixed reviews from critics and has grossed $11 million worldwide, against its $5 million budget.

Guardians of the Galaxy Vol. 2: Guardians of the Galaxy Vol.  2 is a 2017 American superhero film based on the Marvel Comics superhero team Guardians of the Galaxy, produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures.  It is the sequel to 2014's "Guardians of the Galaxy" and the fifteenth film in the Marvel Cinematic Universe.  The film is written and directed by James Gunn and stars an ensemble cast featuring Chris Pratt, Zoe Saldana, Dave Bautista, Vin Diesel, Bradley Cooper, Michael Rooker, Karen Gillan, Pom Klementieff, Elizabeth Debicki, Chris Sullivan, Sean Gunn, Sylvester Stallone, and Kurt Russell.  In "Guardians of the Galaxy Vol.  2", the Guardians travel throughout the cosmos as they help Peter Quill learn more about his mysterious parentage.

Super (2010 American film): Super is a 2010 American superhero black comedy-drama film written and directed by James Gunn, starring Rainn Wilson, Ellen Page, Liv Tyler, Kevin Bacon and Nathan Fillion.  The film is based on a story by Gunn, telling the story of Frank Darbo, a young short-order cook who becomes a superhero without even having any superhuman ability, calling himself the "Crimson Bolt".  He sets out to rescue his wife Sarah from the hands of a drug dealer.

Make the Yuletide Gay: Make the Yuletide Gay is a 2009 American Christmas-themed romantic comedy film written and directed by Rob Williams about a gay college student who is out at school, but is afraid to reveal his sexual orientation to his parents.  It stars Keith Jordan as Gunn, and Adamo Ruggiero as Gunn's boyfriend and roommate, Nathan.  Kelly Keaton and Derek Long star as Anya and Sven, Gunn's parents, while Hallee Hirsh appears as Abby, Gunn's high school girlfriend.

Dawn of the Dead (2004 film): Dawn of the Dead is a 2004 American horror film directed by Zack Snyder in his feature film directorial debut.  A remake of George A. Romero's 1978 film of the same name, it was written by James Gunn and stars Sarah Polley, Ving Rhames, Jake Weber, and Mekhi Phifer.

Supporting paragraphs: Guardians of the Galaxy Vol. 2 Pom Klementieff
Answer: Hacker's Game