I have been thinking about this the last few days. You think Tarentino directs a Marvel movie? Iron Fist or Dr. Strange? Maybe his ego and style is too out of the box for Marvel but man that would be great.
I can't see Tarentino doing a pg-13 movie at this point.
Besides there is going to be an Iron Fist TV show on Netflix, so I don't think Marvel wants to make a movie of that. They are putting Daredevil, Luke Cage, Iron Fist, and Jessica Jones on Netflix with their own shows and then a big mini-series with all of them. Smart IMO, it needs to be more gritty street level that is better for a show. Not all Marvel characters should be on the big screen.