Any further details about the game are still sketchy at this point, but this is something we can glean from the box art and poster. There is a load of speculation going around that the new Assassin is Native American due to what is being worn by the main character. Personally, I think it is a little early to assume that based on the wardrobe, though. I'm not saying that it is out of the realm of possibility, but I have a feeling that it just shows how this Assassin will have ties with the "undesirables" as in the past games. Ezio wasn't a prostitute but he sure did associate with them. Just saying.
Also worth noting is that there was a banner ad run on Game Informer before this posting - showing this new Assassin with what can assumed to be George Washington crossing the Delaware. If I had to make a 'leap of faith' I would say that there is going to be some further craziness with the free masons and the "British" keeping the role of templars. Granted, that is me throwing my own speculation out there based on an ad, but it makes a bit of sense.
Either way, take a look below and keep a sharp eye out here as we will keep you updated as Ubisoft gives out more details. This, if rumors are right, should be sometime next week. We'll see.