Arkham City and Asylum since I've played neither. They were going to be on my Christmas list but I somehow forgot.
Saints Row 3 - I loved the first two games but the third installment doesn't tickle my fancy so much and I'm going to wait until I can find it cheap and after I've finished Skyward Sword, Skyrim and AC:R.
I might also look into playing an MMORPG. I've played City of Heroes and I loved the game until I reached level 50 a couple of years ago, then restarting without my guild which disbanded it was never the same. I also tried Runescape for a few weeks, but it was just too simple and I felt like I was surrounded by criminals - a feeling I really can't elaborate on or explain. I just didn't want to engage with anyone.
I know it's old too, but I also want to play Dragon Age Origins. I played 2 this year and enjoyed it, but I want to understand the rivalry between the fans of the two games and figure out if the handful of people who enjoyed both aren't insane.