"Those reshoots have been blamed for the poor quality of Fantastic Four, but the movie apparently didn't even have an ending when shooting concluded. Simon Kinberg and Hutch Parker scrambled to come up with something, but the former's busy schedule and the fact that much of the cast was unavailable led to "a lot of material was shot with doubles and the production moved to Los Angeles to film scenes with Teller against a green screen."
I have been intrigued by what the original film was - not because I believe Trank had something great, but I'm curious how different it could have been.
I mean we saw the shots of Doom with his blankie in the leaked photos, so that was always part of it and presumably there was always some sort of show-down on "Planet Zero" from the start. So it's not like that's what they added.
The original script must have had some sort of story and ending, right? I mean why would they have green-lit it if it didn't? You don't need to film the whole thing before realizing it doesn't have a story or ending. You should be able to tell that by reading the script and you shouldn't start shooting until the script provides a story that would have to be better than what this film gave.
As bad as this was, it seems at one time there was something worse, and I can't help but be curious about what could have possibly been worse.