6. Adam Sandler - Rocket Raccoon - Guardians Of The Galaxy
Ugh, can you imagine? The only good thing about Adam Sandler nowadays stems from the fact that you can avoid him almost entirely if you want to, given that he doesn't seem to stray from his awful comedies - just don't go and see them, and you're done. At one point, however, Marvel considered hiring the actor in the role of Rocket Raccoon in their blockbuster hit Guardians of the Galaxy. No thank you, Marvel. Bradley Cooper seemed like something of an odd choice at first, of course, but later proved to be the right man for the job - it's hard to imagine anyone else voicing Rocket now that we've heard him do it. But can you picture the sort of character we might have been gifted with had Sandler been given the part? It might've been near on unbearable. Thank our lucky stars that Marvel reconsidered this pick.