The Elder Scrolls V: Skyim. Its release had become doubtful when Bethesda stated that thanks to the PS3's architecture, Dawnguard and future DLC for the console.
That's not to say Sony and Bethesda have given up.
According to Sony VP Adam Boyes on the subject, "We work with all of our partners to try and solve their problems. We have a big, broad dev support team that works closely with Bethesda—and with all of our partners—to work with them to solve that any sort of issues they have along the way. Of course, I always want everything to work always for everyone."
However, Boyes undercut the optimism with a telling addendum, stating, "I can't promise any kind of resolution or timeline but can say that everyone involved is trying their best to get this stuff working."
Dawnguard may eventually come to Skyrim, but it seems like it'll most likely be part of a Skyrim "Game of the Year" Edition rather than as DLC.