Well since the Revolutionary War happened first, it's possibly they could add it in later.
You'll be going through the wilderness with the occasional hunting, with maps either being in summer or winter (since the game will apparently take itself through three decades). There's also Boston and New York to go through. And the improved engine allows them to have a couple 1000 people on screen supposedly, so Connor being in a couple famous battles or two is likely.
For characters, interactions with George Washington is a important relationship in the game, and also Charles Lee. As for Ben:
...won't be some carbon copy of Leonardo Da Vinci from previous games - the convenient inventor concept is not on the menu.
Whatever that means.
From this GI article anyway.