Sony was never good at keeping secrets. Everything gets leaked from that company.
Anyway, The Last Guardian is noticeably missing from that list. Besides The Last of Us, The Last Guardian is the only Sony exclusive that even remotely interests me at the moment.
No, I'm not forgetting God of War: Ascension. I feel like the series has run its course. Once they finished the storyline, why bother? Ghost of Sparta was okay but had no chance of being better than God of War III. Ascension just seems unnecessary. It's another prequel, apparently focusing on Kratos around the time he pledged his life to Ares/after Kratos killed his family. That's the least interesting part of the mythos. Some stories just don't need to be told, some gaps don't need to be filled; mainly because they don't add anything. Maybe the gameplay will be good but unless there are some major changes (doubtful), I feel like I can wait on this one. The other games in the series dropped in price fairly quickly.