Actually, the theory that sequels/reboots stand in the way of other movies is kinda dumb and not accurate. If you compare the movie industry today with 10 or 20 years ago, more movies are being made than ever before. You have something like 5-10 movies coming out every week, and that's just the bigger movies getting a cinematic release. Apart from that you also have indie movies and tons of foreign movies.
If this was the 70's where you had maybe 1 movie opening each weekend, then yeah.. sequels would stand in the way. But as it is now, they don't really. If anything, I feel like it opens the doors for studios to try new things. Like Marvel getting some smaller directors like James Gunn, who is a great director to helm one of their major franchises. Or for movies like Ant-Man and Guardians of the Galaxy to even be made, because the bigger titles were a hit.