We already have an alien land populated by giant aliens at AK. We also have 2 Sci Fi lands (Dinoland and Avatar) I would prefer either another new real local (Australia, South America) but with the IP mandate that’s not happening, so I’ll take a fantasy based land (Shang Chi) or heck, The Lost Continent area that was based on it and Dueling Dragons is gone Beastly Kingdom’s time has come!
I'm not saying we should do that, only that it's one of the few places thematically appropriate once we've moved past the real-world barrier. I'd rather it be a real location and them put in IP based rides than to jam up a whole land with something that gets dated. So if they wanted to annex part of Dinoland into Asia and turn Dinosaur into a Dr. Strange ride I could see that as doable.
I'd much rather see them just do another continent - whether South America or Australia (either would bring a new area to WDW) or even just a North American forest (kinda like the theming for Camp Mickey Minnie). Any of those could utilize existing IPs for attractions while potentially bringing in some new live animals.
This would work fairly well, especially if they just reworked it to "Down Under" so that they can use Australia, New Zealand, and Tasmania easily, plus likely work in mythology from Indonesia or Papa New Guinea. The only problem here is that the areas have notoriously dangerous animals and we don't need to fill up DAK with a bunch of scary rides/experiences.
As cheesey as it is I enjoy Dinoland USA. There needs to be a replacement for PW but I don't see retheming this area as a strategic need. My preference would be that they build in the huge open area behind the RFP train stop and put a big new land there. I'm assuming it might put some strain on the number of people that could be moved, so a third train station could be added to allow for moving 50% more humans at a time. A pedestrian walkway would be nice but that's an odd location that would require some sort of bridge or tunnel past the road and train crossings.