So let's play the fun game of 'What games will be announced at the PS4 reveal?'
I think a bunch of studios will be present, so I'll which devs could be there and what they'll reveal if they are.
Guerrilla - Killzone 4: Guerrilla's an interesting one. It's pretty obvious they have both a new IP and Killzone 4 in development right now, the question is just which comes first. Sony will obvious want to show big sequels as well as the promise of new IP. However I'd bet they're the furthest along with any next-gen sequel than the rest of the first-party devs so Killzone 4 will serve as the blockbuster sequel.
Sucker Punch - New IP: Here's where I'd place my new IP debut bet. Infamous 2 seemed like a good point to leave that series. Sucker Punch is bursting with potential and they've been silent for ages now. I think if they were doing Infamous 3, we'd have seen it this year on PS3.
Evolution - New racing IP: Evolution needs a new hook. I think MotorStorm was a really underrated franchise this gen, but after five separate entries you're going to need to freshen things up a little. I don't think the answer lies in a Need for Speed competitor or new racing sim but something... different. There's room for innovation in the genre, and they have the potential to bring it.
SCEJ - The Last Guardian: I think the smartest thing to do for The Last Guardian at this point is to move it onto PS4, and I'm hoping that's what Sony did a few years ago. It would likely be showing it's age stacked next to the rest of the games on display but it's really the only way to revitalize people's interest in the IP. It's simply been far too long since SOTC now for it to be a success on PS3.
Giant Sparrow - New IP: Hey! The PSN is still a thing and a big push for us! Here's this game to prove that!
Media Molecuel - Social IP: I'm pretty happy with the idea of Media Molecule working on a facebook-like game that will take advantage of the new system's social features.
Ubisoft - Watch Dogs: Ubisoft gets on board with new hardware asap. They have done so for a long time. There's no better platform for Watch Dogs' coming out party than to reveal its next-gen status at the PS4 debut. After the E3-buss Sony would do well to get the name associated with PlayStation. I really think we're going to see this game again on Feb 20th.
Kojima Productions - Metal Gear Solid: Ground Zeroes/Metal Gear Solid V/The Phantom Pain: Kojima was there for the Vita reveal, and I'd lay down good money on him being there for the PS4 reveal. It may be multiplatform now, but Metal Gear is a PlayStation franchise, and this is another great way to gather third party buzz.
SEGA - Valkyria Chronicles IV: Pleeeeeeeeeeeeeeeeeeease.
Naughty Dog - Uncharted 4: I wouldn't expect to see Naughty Dog at this event. However I think their PS4 debut will be an Uncharted game. I think then they'll do a new IP trilogy (maybe Jak 4 too), then they'll do one last Uncharted. So while I don't think the Dogs will be here straight away, I do expect to see Uncharted 4 sooner rather than later.