I think this is rubbish.
The Fantastic Four aren't really a superhero team. They're that old school 1950s sci-fi "Challenges of the Unknooooown!" type of thing where Reed explains what X-rays are while smoking a pipe. They added the superhero stuff to them to make them more popular.
The point I'm trying to make is, when you consider that their biggest villains are: THE MOLE MAN! King of the underworld! DOCTOR DOOM! Evil lord of Latveria! and GALACTUS! World-devouring giant... in a purple sarong! The Fantastic Four doesn't want to make itself 'mundane'. Even the Ultimate Fantastic Four was rubbish. Go to hell, "realism".
These guys should have stupidly crazy adventures. In space. With all manner of weirdness. And it should be operatic. If they MUST steal a template, they shouldn't steal IRON MAN but STAR WARS. If only to have a good template for Doctor Doom.