I think the source material of Fantastic Four is bright, optimistic, poppy in tone.
Simon Kinberg hit the nail on the head when he says that Fantastic Four “ran counter” to the source material.
The Fantastic Four have had a rough history being adapted for movies, but 2015 was especially brutal to them.
I think the biggest takeaway for me [is that] the tone of the movie, while really interesting and ambitious, ran counter to the DNA of the source material.