Now a new report is stating that Phoenix is hesitant to take the role.
According to Bad Ass Digest, Joaquin Phoenix was supposed to walk out on stage at Comic-Con as a big surprise, announced as Doctor Strange. It's said Marvel Studios tried to do everything possible to get him to sign a deal at the last minute.
It's possible that might explain why many considered Marvel Studios appearance at San Diego this year to be rather bland as Marvel was counting on Phoenix.
Regarding why Phoenix didn't sign for Doctor Strange, it's stated the actor is unsure if he can do a big movie with a lot of green-screen acting, special effects and fighting in addition to signing a multi-picture deal as well as many reshoots. Phoenix tends to like smaller more independent films and shies away from big budget spectacles.