10. Doctor Strange 2
Assuming there is a Doctor Strange origin movie in phase 3, then there should definitely be a sequel after that. Stephen Strange is a hugely interesting character and, of all the potential individual hero movies that Marvel has in store, the one most deserving of a series of titular movies. Assuming that the phase 3 instalment, if it occurs as expected, concentrates on Strange's origins and rivalry with a more earthly foe (such as Baron Mordo), then the sequel should see the Sorcerer Supreme going up against the deadly, unfathomably powerful Faltine entity Dormammu. Dormammu is essentially a god - a being capable of rivalling Skyfather entities such as Odin in the comic books, in terms of power levels - and would be a truly universal threat in a movie. He would also look phenomenal utilising modern CGI techniques with his flaming head and would bring a truly unique threat to the Marvel cinematic universe. Essentially, seeing Stephen Strange learn his trade, become the Sorcerer Supreme, and go on to fight cosmic-level threats on the big screen would be a truly epic sequence of events. Of course, if there is no Doctor Strange origin movie in phase 3, then replace this entry with a Doctor Strange origin movie.