Resident Evil 6 will feature a mode where you can play as the zombies, and we now have video of what that will be like in action. The Agent Hunt mode let's multiple people play as monsters and jump into other people's games online, with the obvious goal of killing the hero player.
Additionally, Ada Wong has been revealed as a playable character. Executive Producer Hiroyuki Kobayashi told Famitsu that Ada's story will "clear up the mysteries from the other scenarios." Capcom is just cramming everything and anything into Resident Evil 6 now. Not saying that's a bad thing, though.