I think he means Pokebank like they did with Celebi. I hope they don't since you can't SR for nature/IVs.
I wouldn't quite say you'd be running out of ideas if you used the same map as a previous game. I think it was just a nod to the players who would notice saying like "Hey! We remember." Or at least something like that.That's the difference between similar and identical. Identical would be an appeal to nostalgia, whereas similar would mean they couldn't think of a better design. I mistook which it was.