According to the ESRB, this game contains: Mild Language, Violence
Parents don't have much to worry about. There is no questionable language and no nudity or sexual content. The violence mostly consists of punching monsters, robots, and assorted bad guys in addition to using superpowers like the Invisible Woman's force beams or the Human Torch's fireballs. None of it is very graphic, and there is no blood or gore. If you let your kids see the film, there is nothing in here that goes further than that, and I'd even say it's probably a little bit safer.
Fans of Beat-'Em-Ups will want to check this out. Once you get past the cheesy cover photo from the actual film, the game has a very solid combat engine and a lot of little tweaks to add some much-needed freshness to a genre that badly needs it. This would be a good game without the Fantastic Four license, so it's a shame that a lame movie drags down a title that probably would have garnered a little more attention without it.
Fans of the Fantastic Four or those who like comic book games should also check it out. The movie was terrible, but there's enough reference to the actual source material to help make it go down a little smoother. The game is also solid enough to avoid bringing any shame to the FF themselves, and I can count the number of solid comic book games that exist on one hand.
Deaf and Hard of Hearing gamers get the old half-and-half. There's text accompanying all dialogue for the in-game cutscenes, but there's no text during the CG cutscenes reenacting certain portions of the film. I will never understand why developers do one and not the other, but I guess that's a mystery for the ages. It's playable in its current form since there aren't any significant auditory cues, but it's too bad that there wasn't full access.