If we get new pokemon, I'm really hoping they put some thought into it. The newest pokemon were awful. Thrubbish that looks like a trash heap, litwick that goes from candle to lamp to candelabra, the pokemon that looks like an ice cream come and evolves into two scoops of ice cream....ect.
I'm really curious to see what Pokemon are introduced in this game. Gamefreak has been known to stick to "patterns" (an odd-numbered gen introducing new Pokemon and even-numbered gens introducing evos/pre-evos of the gen before it) but gen 6 sorta broke that. Maybe we'll get more brand new Pokemon lines, or maybe we'll get a smaller batch of new lines and get a bunch of evos/pre-evos for Pokemon from the gen(s) before it.
And those Pokemon you mentioned are kinda old, they had a lot of great designs in XY ^^ But BW had its fair share of good designs, and older gens have plenty of godawful designs so it's safe to assume the next gen will have a mix of good and bad designs. It's been confirmed that they're going to be simplifying Pokemon designs in gen 7 though so let's see how that goes.
There was also a list of Pokemon that was also recently "leaked", so maybe there is a correlation here!
Definitely take those leaked lists with a grain of salt, loads of them always pop up when new games are announced. Even if they're really well written they're usually made by some person in their basement