Avengers: Infinity War is an upcoming American superhero film based on the Marvel Comics superhero team the Avengers, produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures.
 It is intended to be the sequel to 2012's "Marvel's The Avengers" and 2015's "" and the nineteenth film installment in the Marvel Cinematic Universe (MCU).
 The film is directed by Anthony and Joe Russo, with a screenplay by Christopher Markus & Stephen McFeely, and features an ensemble cast that includes Robert Downey Jr., Josh Brolin, Mark Ruffalo, Tom Hiddleston, Chris Evans, Chris Hemsworth, Jeremy Renner, Chris Pratt, Elizabeth Olsen, Sebastian Stan, Benedict Cumberbatch, Paul Bettany, Cobie Smulders, Benedict Wong, Zoe Saldana, Karen Gillan, Vin Diesel, Dave Bautista, Bradley Cooper, Pom Klementieff, Scarlett Johansson, Benicio del Toro, Tom Holland, Anthony Mackie, Chadwick Boseman, Danai Gurira, Paul Rudd, and Don Cheadle.
 In "Avengers: Infinity War", the Avengers join forces with the Guardians of the Galaxy to confront Thanos, who is trying to amass the Infinity Stones.
Chase Stein (also known as Talkback), is a fictional character, a superhero in the Marvel Comics "Runaways".
 He was created by author Brian K. Vaughan & artist Adrian Alphona, and debuted in "Runaways" vol.
 1 #1 with most of the other main characters.
 Like every member of the original Runaways, he is the son of evil villains with special abilities; in Chase's case, mad scientists.
 Chase is often regarded as the "wild card" in the series, due to his often changing role in the group, from being the getaway guy and technical guru to the "loose cannon" after he departed the group for a short while.
 However, despite his rule-breaking persona, Chase is fiercely loyal to his friends and remains a valued member of the team.
 Chase is the eldest of the Runaways at age 18.
 Chase shares a psychic and empathic link with deinonychus Old Lace, granting him the ability to command the dinosaur to do his bidding and also possesses the Fistigons, the world's most powerful gauntlets.
Avengers Assemble is an American animated television series based on the fictional Marvel Comics superhero team known as the Avengers.
 Designed to capitalize on the success of the 2012 film, "The Avengers", the series premiered on Disney XD on May 26, 2013, as the successor to "".
The untitled Avengers film is an upcoming American superhero film based on the Marvel Comics superhero team the Avengers, produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures.
 It is intended to be the direct sequel to 2018's "", as well as the sequel to 2012's "Marvel's The Avengers" and 2015's "" and the twenty-second film installment in the Marvel Cinematic Universe (MCU).
 The film is directed by Anthony and Joe Russo, with a screenplay by Christopher Markus & Stephen McFeely, and features an ensemble cast that includes Robert Downey, Jr., Josh Brolin, Mark Ruffalo, Tom Hiddleston, Chris Evans, Chris Hemsworth, Jeremy Renner, Chris Pratt, Elizabeth Olsen, Benedict Cumberbatch, Evangeline Lilly, Karen Gillan, Anthony Mackie, Tom Holland, Zoe Saldana, Dave Bautista, Paul Bettany, Scarlett Johansson, Jon Favreau, Gwyneth Paltrow, Sebastian Stan, Don Cheadle, and Pom Klementieff.
The Leapfrog is a fictional vehicle appearing in American comic books published by Marvel Comics.
 The Leapfrog is the personal mode of transport for the superhero team Runaways.
 The ship takes on the form of a large frog.
 Originally created by Janet Stein and Victor Stein, the Leapfrog was used by the Pride when they had to perform their Rite of Thunder for the Gibborim.
 After the Pride was destroyed by the Gibborim, control of the Leapfrog rested with Chase Stein and has since been used as the primary mode of transportation for the Runaways.
 The Leapfrog doesn't actually fly; it "jumps" forward to move.
The fictional Marvel Comics superhero Spider-Man, who debuted in 1962, is well known for his unique superhuman abilities as depicted in the comics and other media.
 He receives most of his powers when he is bitten by a radioactive common house spider.
 He uses his technical skill to develop equipment and weapons to complement his powers, and wears a number of costumes, many of which have special properties.
The Fantasticar is a fictional flying car appearing in American comic books published by Marvel Comics.
 The vehicle is depicted as the primary mode of transportation for the fictional Marvel comics superhero team, the Fantastic Four.
 Several versions have been created by Mister Fantastic, leader of the team.
The Fantasticopter is a helicopter used by the fictional Marvel Comics superhero team, the Fantastic Four.
Camp H.A.M.M.E.R. is a training camp in the fictional Marvel Comics universe, Marvel Universe, the "Dark Reign" equivalent to its predecessor Camp Hammond which aimed to train a superhero team for every state of the United States as part of the Fifty State Initiative.
 The camp, located in New Mexico, became the main setting for the "" comic book series.
Marvel's The Avengers (classified under the name Marvel Avengers Assemble in the United Kingdom and Ireland), or simply The Avengers, is a 2012 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 sixth film in the Marvel Cinematic Universe.
 The film was written and directed by Joss Whedon and features an ensemble cast that includes Robert Downey Jr., Chris Evans, Mark Ruffalo, Chris Hemsworth, Scarlett Johansson, Jeremy Renner, Tom Hiddleston, Clark Gregg, Cobie Smulders, Stellan Skarsgård, and Samuel L. Jackson.
 In the film, Nick Fury, director of the peacekeeping organization S.H.I.E.L.D., recruits Iron Man, Captain America, the Hulk, and Thor to form a team that must stop Thor's brother Loki from subjugating Earth.

Question: What fictional Marvel Comics superhero team uses the Leapfrog as their main transportation?
Answer: primary mode of transportation for the Runaways.