Yow, those are nice, RB. Putting the new toy to good use, for sure.
A Haunted Mansion in Tomorrowland is conceivable, but you would have to treat it with the freedom that they did in Paris, or even Hong Kong. IMO, you could do it by building it around an alien abduction theme. It could be a fairly normal looking, modern home, but with weird goings-on and typical "gray" type aliens gradually manifesting in unexpected ways. Bedroom scene with extremely harsh white light beam coming into the window. UFOs. There goes Fred, levitating out the window. We'd probably have to dispense with the rectal probes and such. I never saw "Alien Encounter" so I don't know if they made any use of this sort of thing, but it's turned into a futuristic horror movie plot that is now familiar throughout the popular culture. If there are intimations that the aliens are from the future in some way (?), you've got a direct tie-in to Tomorrowland, but you probably don't need it. The land has never been strictly future-oriented but also space-, techno-, and exploration-oriented.
All together now, "There's a great, big, terrible tomorrow, looming at the end of every day..."
As for the load fixture, evmo, I think you're describing the newel post at the base of the down staircase, the one the doombuggies come down and pass by before you board. Glad you brought it up, because it used to be mounted with a black metal urn identical to one found in the Sťance circle. This would be yet another unnoticed and undiscussed point of architectural continuity in the HM. I think the last time we emphasized that theme around here was when I was calling attention to the lion-head corbels in the Conservatory, which are similar to the ones in the ballroom.
The up staircase has similar newel posts, but they're mounted with candelabrum.
The down staircase newel post no longer has the black urn, however. It is now mounted with...well, I don't really know what that thing is.