It's officially official. Anyone who gets Game Informer already knows this, but AC2 is confirmed with a large picture of a dude with a white hood and not one, but TWO hidden blades.
Hell. Yeah.
There's all kinds of new stuff being put in, as well. For example, in this one, the protagonist can swim.
I don't want to give away too much, but the protagonist in this one is NOT Altair, and it's NOT Biblical times, and NOT the Middle East. It's actually in Venice and surrounding areas during the Renaissance, I believe, and the man is Ezio Auditore de Firenze.
You can do with this info what you will.