I heard that too. And supposedly from yesterday's CoD championship they learned...
-The new wunder weapon the Blundergat... like a shotgun chain gun and shoots little
-Large (Romero like) zombie comes through randomly
-New heads up display specifically for Mob of the Dead
-AK47
-Thompson
-UZI
-Acid and fan traps
-New perk "Electric Cherry" electrocutes nearby zombies during your reload
-Civil war weapons
-Different sounds for different parts of the map (no idea what this means lol)
I'm excited for this! Could give 2 shits about multiplayer any more... they just need to make separate games already!