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OP here, got some more details.
>The game's story will be based upon the unification of the various evil teams across the regions. The game will feature a 'quest' system, similar to other MMO games. Rocket, Aqua, Magma, Galactic and Plasma will combine to form Team Universal, with a goal that has not been confirmed yet by Nintendo.
>You will be able to pick one of the starter Pokémon from the previous games, totalling 15. This is believed to add extra flexibility between player's play styles and Pokémon teams.
>Character customisation was a feature much discussed by the development team, and will be in the game. It will be a lot more detailed and accessible than what will be found in Pokémon X and Pokémon Y.