Honestly the first Dr. Strange was just okay. They can find a better director.
In the end what do I know, but articles definitely made it seem like Derrickson wanted to make the first MCU horror movie, while Feige wanted another superhero movie with a few scary parts along the way.
If that's the case, I'd lean towards Feige's side. I love horror movies and I like the MCU but I don't really need to see those worlds combine. While I do think the MCU needs to take more risks if they hope to stay on top, that route doesn't interest me personally for Dr. Strange. And yeah yeah I know the comics are more horror blah blah I don't care.
Having said that, if they made a horror Ghost Rider or Blade, I'd be ALL IN.