I don't. Honestly, if next Gen just pulled a Gen 4, gave us ~15 evolutions to Pokemon that needed them, I'd be fine with it.
What I really and truly want Gamefreak to do is to spend a generation updating stats, abilities, and mechanics so shit is viable again.
Like fuck, let Slaking use non-attacking moves during his loafing phase. Give general stat buffs to lots of pokemon and fix the FRAIL, SLOW, MIXED ATTACKER problem. Give pokemon better movepools, give more pokemon priority moves now that priority has been nerfed. Give Hypno Dream Eater already, holy shit. Let Nidoking and Nidoqueen breed. Give us an Item PC box.