I blame the multiple times I played the demo, figuring out more Batman-like ways to take out the bad guys. I've lost count of how many ways those last five inmates can get incapacitated :D “What would Batman do?” is the question to ask yourself when you play the game.
Another factor that convinced me to buy the game is the availability of DLCs. The Joker DLC is already available on the Malaysian PlayStation Store. I hope the rest will follow too.