MCU: 30 Actors Who Could Have Starred In Avengers: Infinity War
24. Joaquin Phoenix (Doctor Strange)
The fantastic Joaquin Phoenix was offered the role of Doctor Strange, but ultimately decided to pass on the role for fear of being locked into a multi-movie contract where his freedom as an actor was severely limited. Benedict Cumberbatch quickly filled the position, and Marvel were golden.
Would It Have Worked?: Absolutely. Phoenix would've been incredible in the part, especially conveying the arrogance of the character, but considering the way he likes to act and the jobs he likes to take, it's easy to imagine him struggling in this sort of tentpole environment.
It would have been fascinating to see him in the MCU, but it just isn't a neat fit for the kind of actor he wants to be. One could easily imagine him quitting the role after a movie or two, requiring a messy recast.