The official site has revealed that yet another new Pokémon will be revealed on their Facebook page on September 25th. This Pokémon is said to be an evolved Pokémon but there are no further clues. We'll bring details as soon as we have them

http://www.serebii.net/index2.shtml

I want to see Tyranitar's mega-evo

I doubt it's a starter evo cause they would probably reveal all three at the same time, not just one. I don't see many new pokémon that the reveal of their evo would be a big deal enough to be worth the tease, so I'll guess it's either a new evo or a mega evo of a old pokémon.

Metrium said:
I doubt it's a starter evo cause they would probably reveal all three at the same time, not just one. I don't see many new pokémon that the reveal of their evo would be a big deal enough to be worth the tease, so I'll guess it's either a new evo or a mega evo of a old pokémon.



they didn't reveal all second stage starters in Black/White at the same time though. 2 were revealed then 1 later (i think like a week or 2)

Maybe they will show the final form of the starters, one each week until release.

I like it, hopefully Fennekin and Chespin final evolutions are cool too

^Chespin final evo going to be a knight, its going to be bulky as hell