B2W2 Event - Single Battle Strongest Pokemon

Another Pokemon will be distributed at Pokemon Centers in Japan with a theme of being powerful Pokemon for Single Battle use.

The Pokemon is/are level 100 and will be distributed from September 15 to October 28 to Black 2 and White 2 games only.

The Pokemon is not yet announced, and it may be one Pokemon, or it may be two as they did for the Tag Battle event previously.

http://www.pokemon.co.jp/info/2012/08/120817_p01.html?bs001=news

Edit: Just caught that the thing says a Pokemon will be randomly distributed, so it looks like more than one will be available, and you can't choose which you get.

(Sept 13) Edit: Corocoro leak has pre-empted the official site update.

It'll be five Pokemon distributed randomly: Metagross, Dragonite, Scizor, Garchomp, Tyranitar.

I'll be picking them up this Saturday when the event begins.

Another edit:

http://www.pokemon.co.jp/info/2012/08/120817_p01.html

Official site update, pokemon will be at level 100 and there will be seven distribution periods (you can get one of the five pokemon during each period, randomly).

If they are being distributed at random and there are distribution periods will they have different wonder card ID numbers?

Yes.