One looks like a menacing band of pirates and the other looks like the chess team in highschool.
Now I see why they decided to do remakes of Ruby and Sapphire instead of Emerald. I'd never be able to take a rivalry between these two seriously.
And it looks like Secret Bases may be coming back, which is awesome. Hopefully they've added a bunch of new stuff to put in them.
Some possible Megas. No clue if the image is real or not, especially since all of them are gen 3 Pokemon, but who knows.
New gym designs. Roxanne's has become nightmare fuel.