How about instead of just a new war zone. Make a BOUNTY system for PvP. As you kill members of the opposing faction in open world PvP different levels of bounty accrue on your character once you get high enough INFAMOUS gear becomes available from special vendors. During this time other players can take out CONTRACTS on the Infamous players up to a total of 4 people after 1 target. These players receive real time information on what zone the target is in but must find them in that zone themselves. If the INFAMOUS player kills his assailants he receives a big boost to his score. If the CONTRACTS are completed the players that complete it are awarded points in relation to the targets score to exchange for ENFORCEMENT gear.