I was thinking a infected type game mode.
There are 16 people (or what ever the room cap is) who are humans then when the infected countdown starts you have 10 seconds to run around find a good spot. then when the countdown is over a random person becomes a wolf and tries to infect all the other humans.
Much like MW3 Infected Matches
(And don't say oh thats completely copying MW3)
So What Do You Think?