In this morning's Nintendo Direct, Game Freak and the Pokémon Company revealed something special for long-time fans of the series. In addition to the starters for X and Y (Chespin, Fennekin, and Froakie), Charmander, Squirtle, and Bulbasaur will be on hand.
More importantly, they'll be getting mega evolutions. We've got more on mega evolutions, our PAX 2013 experiences, and the upcoming Pokémon Bank online service. You can see more on the mega evolutions of the three original starters in the Nintendo Direct.