I'm just going to say - a F4 movie won't ever work.
The Fantastic Four are, in essence, "The First Family of Comics". They've tried mixing up the comic by swapping out characters here and there, but it always comes back to A man, his best friend, his girl and his girl's brother. A tight, close knit, group. The adventures and battles they have are the side-story. This isn't the kind of thing you can grow, shape and mold in a 2-hour movie *and* fully develop a villain *and* fully develop conflict between the two *and* make us care about both sides enough to be invested in what's actually going on. Even something like X-Men, the focus is put on Wolverine and the others are thrown in to the background - and all you have to do here is build the characters - Fantastic Four really requires that you build the characters *and* build their family dynamic into the picture. Sure, in X-Men, you have to establish Wolverine's relationship with Rouge, then Jean Grey, then Professor X, then Cyclops, then Storm... but what about Professor X and Storm? Rogue and Cyclops? They don't really interact much. But, to make the Fantastic Four work, you have to show each of the characters interacting with each of the characters to develop this family that we're supposed to care about.