Good trailer! I like the subtle enhancements in graphical style (notice the added details to Travis and what's-her-name in the cutscene, especially their hair), and it's nice to see more variation in henchmen/beam-katana-fodder.
As for some of the recent rumors: if the fights are supposed to take place over a worldwide setting, then maybe some of the open world game elements will be removed. (That might be better than trying to improve them, although I never found them that boring in the original.) And if there are supposed to be 50 assassins to fight, I can only imagine that either some of the uniqueness of the fights will be toned down, competing up-and-comers will be taking down assassins in a race with you for the #1 spot, or particular story events will take care of many of your combatants for you (maybe a bomb in the midst of this "mother frocking war"?).