Netflix series produced by Marvel will remain on tne service. Studios that are owned by conglomerates that operate competing pay tv/streaming services still want to make money selling to other outlets. The R rated nature of the NF/Marvel shows aren't compatible to be on a "Disney" name branded service.
That is if Disney doesn't get into the R-rated business. I think it's just a matter of time before they expand into that territory. They won't give up on the family oriented stuff but their is no reason they can't do both. I think there has already been talk of a r-rated Disney movie and then you hear about that idea of selling 2 versions of the same movie. One that is edited to be more familiy friendly and another that is the more pure version of the movie.
I especially think this will be the case for tv where they more edgy stuff I think tends to be more popular today. Shows like "Game of Thrones" and "Walking Dead."
Jason