While Doctor Strange hasn’t even opened in US theaters, the film’s director, Scott Derrickson told IGN recently that he’s already thinking about what might be down the road for the good Doctor and what he personally would like to see.
I really like the character of Nightmare and the concept that the Nightmare Realm is a dimension. […] That’s early – that’s like the first Strange tale. I think that’s in the introductory episode of Doctor Strange, and I always loved that.
Since Nightmare, and his Dream Dimension, did also make his debut appearance in the same issue as Stephen Strange himself it does seem that perhaps using the character in the first film would have been a good idea. However, Derrickson had reasons for not going that route.
We decided not to do that because that’s a bit of a complex idea to try to introduce everything we do introduce and introduce the idea of nightmares themselves as being a dimension. I hope somewhere down the line we do get to explore that because I think that’s super cool concept.
While there are no concrete plans for a second Doctor Strange film, it has been confirmed that he’ll play a part in the upcoming Avengers: Infinity War film slated for release on May 4, 2018.
Doctor Strange will open in the US on November 4.