Eurogamer writes: "EA plans to reinforce Mercenaries 2 with free downloadable content this month (pinch, punch, etc.) and a bigger update in November.
The first round of content is called "Total Payback" and includes a cheat that unlocks all the weapons, vehicles and airstrikes, and another one for infinite health and ammo.
The Total Payback pack also includes cross-region co-op, allowing you to play the game with people from all over the world, and six new playable characters. There's one called Blanco, and one called Fiona, and Ewan and Eva. The other two names are secret, for some reason. Perhaps they're rude."