For those who didn't see this in the Microsoft press conference...
Super Ultra Dead Rising 3' Arcade Remix Hyper Edition EX + Alpha
Trailer:
It's sort of a score attack mode, set in broken up sections of the DR3 map, which have been decorated up to match the theme. A lot of the buildings are arcades now, for eample. You play as Nick, Annie, Chuck Greene, or Frank West. Each character has 5 outfits, 3 of which are "cosplay" outfits from other Capcom games. Each outfit has a weapon that goes with it, which has unlimited "ammo" if applicable, and a special moveset associated with it. X, Y, B, and RT perform different moves based on the outfit. You gain money as you kill zombies and you use that money to unlock more costumes. Anything from other games has other requirements too. To unlock Ryu for Nick, you have to find the Street Fighter arcade machine, clear enough areas as Nick, and earn an S rank on the first area, and then pay $12,500 of the money you collect in the DLC.
There are 4 districts, each broken up into challenge areas. Ingleton, the first one, starts off telling you to kill 50 zombies. Once you do that, you grab a vehicle and go to the next area, collecting money along the way. When you get there you have a limited amount of time to find and destroy 3 generators, then you get to the garage and destroy the door. Next you have to kill 500 zombies within the time limit. It goes on after that, I can't remember how long. It's probably 20 minutes or so for the first district, and it takes some time to get the money and requirements to unlock the costumes.
Here are the costumes in the game:
Nick Ramos:Standard outfit
Tuxedo Nick
Edward Falcon (Power Stone)
Felicia (Darkstalkers)
Ryu (Street Fighter)
Annie (from DR3):Standard outfit
Schoolgirl Annie
Regina (Dino Crisis)
Chun Li (Street Fighter)
Nina (Breath of Fire IV)
Chuck:Standard outfit
Tir Chuck
Shoma Sawamura (Rival Schools)
Sigma (Megaman X)
Captain Commando (Captain Commando)
Frank:Standard outfit
Servbot Frank
Haggar (Final Fight)
B.B. Hood (Darkstalkers)
Soki (Onimusha)
I was messing around with the Xbox One Game DVR while playing: