Just post on the thread to sign up and say you'd like to play in it (you can specify you'd like to play with Carl, it'd give you even more of a chance staying there in case they need to balance at some point). Me, I'm in this to kill you guys, so I'm fine with staying on the opposing side.

See you on the battlefield, nabs! There's no shame in getting your head hewn off by me.
(I might run away until most of the people have died so my fps gets up, though.)