It looks like what they have done is taken the survivors of the zombie plague and had them do what was done in Land of the Dead, Human on Zombie death matches. Maybe Thunder Dome with Humans vs. Zombies. Maybe more WWE with Humans vs. Zombies. Or maybe even further Rehabilitation with Humans and Zombies and less giant ridiculous trucks and cars with dildos. (Bonus points to who names that reference.)
In any instance, here is a fun clip, WWE style, of what we have to look forward too as far as multiplayer in Dead Rising 2 will be.
Terror Is Reality XVII: Payback
Now that you have had a glimpse there, you may be thinking "Yea there are some cool ways to kill zombies in the arena, but what about in game?" Well, also fresh from TGS are some great and funny videos and images of what your arsenal may encompass. I'd say which my personal favorite would be except, how do you choose from a Wheelchair to a set of antlers to a craps table stick? You really can't. So I will go with the good old trusty dual chainsaw staff. I bet you thought I was going to say a knife huh?