Haunted Mansion was the "gimme" idea from the start. I think that it would attract more interest than Star Wars. Why there isn't at least a HM themed restaurant, I have no idea.
The problem with doing this sort of thing with The Haunted Mansion is that the Mansion is a sole and exact location. You're kind of landlocked there, literally and somewhat creatively.
If you're building a Haunted Mansion Restaurant in the park, it either has to look like you're going into the Mansion that already exists, or you've got to pull a Memento Mori and create a Mansion-adjacent location that can serve a similar spooky function. But if you go too far you're no longer dealing with the Haunted Mansion, you're dealing with, like, a Ghost Town, since so many different places are now "haunted", which takes a little bit away from the Mansion being
the place to go for creepy creeps. But it wouldn't make sense to say "you're having dinner in The Haunted Mansion!" if the restaurant isn't located somewhere that could plausibly be part of the house. You couldn't take over Liberty Tree and say you're having dinner
in the Mansion, you know?
Then when it comes to a Haunted Mansion Hotel, what would the situation there be? Would they build a second Haunted Mansion somewhere on property outside of the Magic Kingdom that guests can stay in? That doesn't seem like the kind of redundancy Disney is willing to go for. Is it a new, separate building that
also happens to be haunted by many of the Ghosts in the Mansion? I suppose you
could stretch that far, but it's sort of at odds with the idea that the Mansion is the final resting place for all of these ghosts (aside from the ones who follow you home). I still sort of wonder how they were planning to make sense of those proposed Haunted Mansion Rooms at Port Orleans, but maybe that's why they never happened. Or maybe they're just not as concerned about this stuff as I'm thinking they should be.
I feel like it almost might be more likely that they'd do a new-concept Spooky Boutique Overnight Experience that is merely Haunted Mansion-
like rather than based on the Mansion specifically. Similar to the way the Tower of Terror shares some spooky DNA with The Haunted Mansion but isn't directly connected to it story-wise. Creating an original idea around a place you can stay where things go bump in the night would let them circumvent all the corners using the Mansion itself would back them into, while still giving people who love that sort of thing a comparable experience.
I do sort of imagine sometimes that if Disney were to build a new resort from the ground up you'd be much more likely to see a new Haunted Mansion that builds a restaurant "inside" from day one, or a Tower of Terror with a Boutique Hotel element inside, which was pitched for the MGM original but ultimately scrapped. Clearly they have some desire to get into this sort of thing, but it's much easier to make work when you've factored it in from day one. I don't really expect any of
that to happen any time soon, but it's fun to think about.