Please god no. I don't want a gen 7. Sure gen 6 brought in some great improvements to the competitive battling scene with Fairy types and the 5 turn limit on weather. They also had a few good Pokémon in there that I liked, and not to mention that it was interesting to see 3D Pokémon. Megas were also a nice touch. However, I feel like all a gen 7 would do is clog up the Pokedex to an obscene level just to introduce some new Megas.
However, if a gen 7 were to come out then I'd want it to have excellent music and different music at night time than in the day time, just like gen 4.