Just got this one. Testing it now.
Found what I consider to be a flaw.
Can you have multiple save slots in Dead Rising 3?
There is only one save slot. If I want to play in a co-op game and then have a separate single game its not possible. The only thing you can do is reset the whole thing. You could always make a new XBL (Xbox Live) profile, and start the game there. The Xbox now only requires one gold account per console to access all gold features.
Dead Rising 4 does have multiple save slots. It has 4 slots but its a single player game. Go figure.