I guess it depends on how extensive the PM redo would require. I imagine just bringing that back is a large factor in determining what to do with the rest of the land.
I like my theory (or wish) that Buzz will be used for PeopleMover show scenes and queue space. First of all because they wouldn’t bring it back without an IP tie in and that seems like the only way to add some IP in any meaningful way. Second, if the rumors are true that the PeopleMover would only circle TL proper now and not extend all the way out over Autopia etc then they will need to beef up the ride time. Third, the building was used as the Rocket Rods queue. They’ll have to put the queue somewhere.