Personally, I'd like a Gen 6 announcement or a Gen 5 Wii U game- battle simulator like PBR, or preferably an RPG. Not massively fond of the idea of Gen 3 remakes just yet, and that wouldn't be an "evolution" anyway.
You can have better graphics not using 3D models too
I mean look at Paper mario Sticker Star. Looks great.
I'd say increase the pixel count in the sprites to give them a smoother look. And the 3D can come in the form of the overworld, attack animations, Cut Scenes, special mini games, and other stuff.
A reworking of move pools, abilities, and stat allocations, can result in a Gen 6 game on the 3DS but I fear it will end up being the "Gen 3" of the new era where you cannot trade or battle from games of the older gens.
Everything has a cycle of life in the Universe, natural or unnatural it has a cycle.