I've mentioned once before a handsome book Walt put together and gave to all the folks at Disney who worked on Fantasia, shortly after the film was released in 1940. It contains some pre-production artwork, including several paintings for the "Night on Bald Mountain" sequence. Neither "concept art" nor stills from the actual film, they fit into an in-between niche all their own.
Here's another piece from that book, sure to delight any HM fan.
The wraith in the center bottom is so similar to the ballroom wraiths in the HM that it could pass for a painting of one of them. Granted, it's a pretty generic ghost type, but the out-turned hands, the cut of the shroud...this guy is a ringer. A ringer wraith. Maybe an influence, maybe not, but interesting nonetheless.
The most striking figure is the lacy female. Is she a bride? Hard to say, but probably not. Like the original Little Leota figure. She looks vulnerable and threatening at the same time, like the original attic bride. That mask-like face is interesting too. It's less screamy but otherwise not terribly unlike the skullish organ banshee.
I guess you could say she partakes of some of the same intriguing ambiguities that certain HM ghosties do.