I mean there is actually reason that fantastic is part of the team’s name. And it’s not because of their gritty realism.
Look at the picture on the left. That is the sort of thing that makes the Fantastic Four interesting.
If you must do gritty realism then do a Daredevil movie or something. The Fantastic Four should absolutely be larger than life.
It should be epic and awe inspiring and ideal feature either space or other dimensions.
Unfortunately it seems that the producer of the latest adaptation (which up to now I’d quite liked the sound of) thinks that grit and realism is what we need…