At this stage we have absolutely no idea what said project will be, but this is the first time Insomniac has worked on a multiplatform project.
Insomniac is known, of course, for its work on Ratchet & Clank and the Resistance series - so you might expect that guns may be involved in some way. That being said, Insomniac publicly stated that having EA as publisher represented a new step for Insomniac, so it could be that the team are working on something completely fresh. At this stage all we know is the project is a new IP.
Insomniac confirmed the upcoming reveal via twitter and, interestingly, used the words "new Xbox 360 / PlayStation 3 game and universe". Perhaps this project is something a little more large scale which, considering the scope of Resistance, is a pretty huge call.
EA's conference kicks of at 5.30am AET. We'll be awake for it, how about you guys?