The DLC also adds 3 new VR Simulation discs. These are challenge rooms where you fight waves of enemies or boss rushes. Completing them unlocks bonus cosmetics (alternate costumes for the new characters).
There are two main DLC packs (released separately): marvel ultimate alliance 2 ps3 dlc pkg
Total New Characters: 6
Also included: New simulation disks featuring these characters. The DLC also adds 3 new VR Simulation discs
It is important to note that DLC on the PS3 is region-locked. Juggernaut Playable Character