The Assassin's Creed 3 trailer from the Ubisoft E3 2012 press conference demos the many differences between Old Europe and The New World, where grassy plains change up the typical battlefield in AC3. These low-lying levels replace the tall, historic buildings that occupied the 15th Renaissance era from previous games. Needless to say, this changes up the gameplay in Assassin's Creed 3 quite dramatically.
Speaking of drama, the Assassin's Creed 3 E3 2012 trailer also clues us in on the new assassin, Connor, who doesn't have a horse in the Revolutionary War - although he does manage to steal one in this video. He borrows the horse to charge a battalion of red coasts and slaughter them at the AC3 trailer's dramatic conclusion.