Realistically, you're probably looking at LOTR, DC Comics (if they wanna move on from Marvel), Scooby, Looney Tunes, and the MonsterVerse aka Godzilla/Kong. That's not to say each will get a land, but those are the properties that they'd probably want to look into adding to the parks in some shape or form.
And then obviously, the HHN implications - which means IT and Conjuringverse have a good shot.