I hope that doesn't happen ;_;
I'm pretty sure there isn't going to be pokemon z, because x and y are DNA-related letters. The whole game's story and even the logo & the new pokewatches are based on DNA, so I don't see how z can possibly fit into this.
sure, the actual LOOK that xerneas and Yveeltle have are like dna and stuff, but the gimmick is a play on the previous above statement. So a pokemon Z is not unlikely.
I guess a pokemon z's not unlikely, but I think they'll just make Pokemon x 2 and Y 2, like how they did with black&white. And I think the DNA theme is really there in the game.
1) mewtwo form and new eevee were one of the 5th gen pokemons first introduced. Both pokemon are closely related to genetic/DNA mutation
2) In the official main characters art, if you zoom in on the male player's watch, you can see a tiny scroll of DNA.
3) In the pokemon x&y logo there is a DNA
4) X and Y are the letters for chromosomes
sorry for long comment!
but I like it, let's just hope he doesn't get stomped too easily by other Legendaries such as Mewtwo.
This looks awesome, the more I see this, the more I want that October comes