He has (at least one) hidden blade
While it looks like his main, signature weapon s going to be a tomahawk, the new assassin will still have at least one trusty hidden blade. On the game's cover it's right in plain view (not so hidden, is it?), but we don't see it in any of the other images, so we don't know if he'll start with it, or gain it at some point in the game. We also don't know if Assassin's Creed II's addition of a second blade will return, or if that will remain a signature Ezio thing.