Ultimate Fantastic Four is a superhero

Superhero

A superhero is a type of stock character, possessing "extraordinary or superhuman powers", dedicated to protecting the public. Since the debut of the prototypical superhero Superman in 1938, stories of superheroes — ranging from brief episodic adventures to continuing years-long sagas —...

 comic book

Comic book

A comic book or comicbook is a magazine made up of comics, narrative artwork in the form of separate panels that represent individual scenes, often accompanied by dialog as well as including...

 series published by Marvel Comics

Marvel Comics

Marvel Worldwide, Inc., commonly referred to as Marvel Comics and formerly Marvel Publishing, Inc. and Marvel Comics Group, is an American company that publishes comic books and related media...

. The series is a modernized re-imagining of Marvel's long-running Fantastic Four

Fantastic Four

The Fantastic Four is a fictional superhero team appearing in comic books published by Marvel Comics. The group debuted in The Fantastic Four #1 , which helped to usher in a new level of realism in the medium...

comic book franchise as part of its Ultimate Marvel

Ultimate Marvel

Ultimate Marvel is an imprint of comic books published by Marvel Comics, featuring reimagined and updated versions of the company's superhero characters, including Spider-Man, the X-Men, the Avengers, and the Fantastic Four. The imprint was launched in 2000 with the publication of the series...

 imprint. The Ultimate Fantastic Four team exists alongside other revamped Marvel characters in Ultimate Marvel titles including Ultimate Spider-Man

Ultimate Spider-Man

Ultimate Spider-Man was a superhero comic book series that was published by Marvel Comics from 2000 to 2009. The series is a modernized re-imagining of Marvel's long-running Spider-Man comic book franchise as part of its Ultimate Marvel imprint...

, Ultimate X-Men

Ultimate X-Men

Ultimate X-Men is a superhero comic book series that was published by Marvel Comics from 2001 to 2009. The series is a modernized re-imagining of Marvel's long-running X-Men comic book franchise as part of its Ultimate Marvel imprint...

, and The Ultimates

Ultimates

The Ultimates is a fictional group of superheroes that appear in comic books published by Marvel Comics. The team was created by writer Mark Millar and artist Bryan Hitch, and first appeared in The Ultimates #1 , as part of the company's Ultimate Marvel imprint...

.

While the characters may bear resemblance to their normal Marvel Universe

Marvel Universe

The Marvel Universe is the shared fictional universe where most comic book titles and other media published by Marvel Entertainment take place, including those featuring Marvel's most familiar characters, such as Spider-Man, the Hulk, the X-Men, and the Avengers.The Marvel Universe is further...

 counterparts, they differ in many aspects.