From my view, Dizney-Marvel shot themselves in the foot with the ending of Avengers.

We will see what happens when it is not a niche that is left unfilled, but a major genre.

The major issue isn't about filling niches, it is about control.
About programming. Mental programming.

And the problem is that production costs are falling. Now, anyone with an iPhone can make original Doctor Who content just as easily as the BBC did 30 years ago. Soon, talented groups of kids are going to make motion picture quality ... "things".

So, we have hollywood trying to control the narrative and keep the programming going, while their programming attempts become more visible and people walk away.

At the same time, small content creators are making shit that people really want to watch.