1) Thank goodness the gondolas will have AC - I can't imagine what they'd be like in the middle of summer packed with hot sweaty people all day!
2) At a guess, the two IP's that are jumping out at me as "worth fighting for" (no, not Mulan!) are Tarzan or Moana. Both would thematically fit in two parks. I don't see how Indy could really fit in any other park (well, I suppose it could be themed to Adventureland, but there is no room for such a big attraction. DAK makes the most sense for that one...) and can't think of any other rumored IP's that parks would be fighting over.
3) As I said above, Indy makes perfect sense for a Dinoland USA replacement. The Chester and Hester area desperately needs a redo, and Dinosaur could easily be re-themed to Indy using the same ride tech.
4) Do we know if the Galaxy's Edge will be identical on both coasts? Or could WDW's be slightly different to the map published by OC Register?