I doubt Grizzly River just because there are so many similarly themed rides between the parks already. I would love to see an attraction already out there rethemed to Moana. Hell I would just love her to be inducted into the princess line up already with a meet and greet! I have no interest in more indy honestly, I feel that franchise has come and gone and with so many other newer ones that are not being represented and would fit, I just think that would be a better use of funds. We already have our throwback ride in Tron (I am sorry for being such a millennial about it). An UP ride would also be cool but that seems to be more likely in AK or way down the line in Epcot. Maybe Jungle Book?? Seems like that would go to AK but who knows! What I would love, and I know I talk about it all the time, is Emperor's New Groove!
Edit: Forgot to mention that I would LOVE a Tarzan attraction