I haven't read anywhere whether or not Skywalker Ranch was included in the sale, but it's likely that it was since it's a workplace of LucasFilm and other companies. Since Disney now fully owns
Star Wars (and everything else), they will also own all that archive.
I'm still can't see any sensible way they can do a third trilogy. There's no baddie, so tha means inventing a new one and concocting some half-baked backstory to explain why they never appeared in any of the previous ones. Seems like an ill-fitting part that will make a mess of the Saga's compete storyline of Anakin Skywalker. Seems like just a greedy cahsing-in exercise.

More spin-off movies = Yes (if done properly and fitting within the established universe)
More "Episode" movie = NO!