Writers vs Fans
Let's pretend for a second that a major motion picture studio is going to make a new big budget movie based on a major event in either the DC or Marvel Universes i.e COIE, OWAW, IG, WWH etc. Now let's also pretend that the writers of said movie actually care more about making a movie that die hard comic book fans will enjoy rather than making money.
Is there any event in either comic book universe that is so sacred that it would prevent a movie being made according to these stipulations? No matter who is cast, who is directing, or how much money is put into the project.