I've got an idea for the Hoenn remakes, or just any new region stuff gamefreak plans in the next game.

Deep sea diving will HAVE to return, and with it, there shall be more content under water than above. This means it should have but not be limited to Deep sea monsters

And they could also add a giant kraken-like creature to boost things up, as well. We're talking wailord x5 in length and height. So huge it won't be able to fit on the screen. Plus, since it's in 3D it's gotta have it's own camera movements.

Only question is, what will it look like?