Something Resident Evil 6 could use is more multiplayer modes. The realm of multiplayer is endless and the experience is always changing. For a fast paced, side vs. side, horde mode-esque fight mode, Resident Evil 6 introduces Siege.
This DLC has player BSAA agents protecting their rookies vs. player monsters in a timed battle. The agents need to survive and zombies need to feed. Both sides have powerful items or unlocks they can find during the match. After the round ends the sides swap and it starts all over again.
Siege mode will be out in March for both PS3 and Xbox 360 for $3.99 or 320 Microsoft Points.