Black 3 and White 3. Full fledged sequels in its non-Mega timeline. Not stripping such a huge feature, Megas would be post-game exclusive content, with all new Mega stones hidden around the world for you to find, with a couple of handouts.
The regional Dex would be all Gen 5 and some previous gen Pokemon, with the gen 6 and beyond in post-game. The full regional Dex should be around 300 Pokemon.
The story would continue Team Plasma in some way, with N and Hilbert/Hilda returning. Gym leaders and elite 4 would be a mix of old and new, with at least one previous gym leader being an elite 4 member.
Some other shit but I'm at work and phoneposting, but I just like the idea of another set of sequels since it never got a third version like the other before it, so why get remakes like the others before it?