Every game COULD be wildly different than the last. The one that's coming out this year, new guy new time. That could be anything, it's a clean slate. Not only that but it's another year of getting the new mechanics from ac3 better. I view ac1, the ezio games and ac3 as three different franchises. The jump from 1 to 2 was so amazing, it's hard to believe they were in the same generation. Then ac3 is basically a reboot, starting all over at ac1 with the not so good game. That means the game coming out this year will be the new ac2. They are ditching connor like they ditched altiar and changing setting. I will bet everything on the new guy being way more likable just like ezio. This new one is really the most exciting one in all 5 games, no desmond, no connor, new setting. This new game can be literally anything. Also a separate team spent three years making ac3, so it is very possible that this new one could have been in development for 2 years not just one.