Question: Which film co-written by Dan Gerson was loosely based on a Marvel Comics superhero team?

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Untitled Avengers film: 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.

List of New Warriors issues: This is a List of New Warriors Issues.  New Warriors is a Marvel Comics superhero team, traditionally consisting of young adult heroes.  They first appeared in issues 411 and 412 of the Marvel Comics title "The Mighty Thor".  From 1990 the New Warriors were featured in an eponymous series written by Fabian Nicieza with art by Mark Bagley until 1996.  The series lasted for 75 issues and four annuals.

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.

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.

Avengers: Infinity War: 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.

Dan Gerson: Daniel "Dan" Gerson (August 1, 1966 – February 6, 2016) was an American screenwriter and voice actor, best known for his work with Pixar and Walt Disney Animation Studios.  He co-wrote the screenplays of "Monsters, Inc.", "Monsters University" and "Big Hero 6", which was reported to be his last film as screenwriter.

The Avengers (2012 film): 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.

Fantasticar: 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.

Big Hero 6 (film): Big Hero 6 is a 2014 American 3D computer-animated superhero-comedy film produced by Walt Disney Animation Studios and released by Walt Disney Pictures.  Loosely based on the superhero team of the same name by Marvel Comics, the film is the 54th Disney animated feature film.  Directed by Don Hall and Chris Williams, the film tells the story of Hiro Hamada, a young robotics prodigy who forms a superhero team to combat a masked villain.  The film features the voices of Scott Adsit, Ryan Potter, Daniel Henney, T.J. Miller, Jamie Chung, Damon Wayans, Jr., Genesis Rodriguez, Alan Tudyk, James Cromwell, and Maya Rudolph.

Avengers: Age of Ultron: Avengers: Age of Ultron is a 2015 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 the sequel to 2012's "The Avengers" and the eleventh film in the Marvel Cinematic Universe (MCU).  The film was written and directed by Joss Whedon and features an ensemble cast that includes Robert Downey Jr., Chris Hemsworth, Mark Ruffalo, Chris Evans, Scarlett Johansson, Jeremy Renner, Don Cheadle, Aaron Taylor-Johnson, Elizabeth Olsen, Paul Bettany, Cobie Smulders, Anthony Mackie, Hayley Atwell, Idris Elba, Stellan Skarsgård, James Spader, and Samuel L. Jackson.  In "Avengers: Age of Ultron", the Avengers fight Ultron, an artificial intelligence obsessed with causing human extinction.

Supporting paragraphs: Dan Gerson Big Hero 6 (film)
Answer: Big Hero 6