The way things are, I expect almost all studios/publishers except Sony and MS first parties/exclusive deals that we dont know - to release their trailers/game announcements the weeks/days before E3, so they can steal some press time for their productions
On being a clairvoyant, I cannot think in a year that some of the best fps shooters in the industry (fingers crossed) are going to be released (Halo 5, Doom 4, CoD BO 3, Star Wars Battlefront), that Sony will not release a first party AAA shooter of their own making.
I guess a version of Killzone is a probable candidate (being a new game on the franchise or an HD remake of Killzone Mercenaries or an HD remake of Killzone 2)
I also believe that they are going to reboot the Resistance franchise as another candidate on the shooter games
I am pretty sure that Sony Bend is creating an FPS game at the moment, as the FPS genre (and racing) is where Sony is lacking in quality first party titles at the moment
In all other genres Sony has great games and great IPs compared with the rest of the competition
On hardware I expect Sony and MS to announce console bundles with larger hard drives, at the same price point, and I am sure that Sony will give for free The Order and Bloodborne on their bundles
On handhelds, I expect the announcement of Vita 3000, with lower cost, better battery life and an hdmi out, so we can play vita game on our TVs
Plus an official drop on PS Vita memory prices and the announcement of a 128 Gb option
And Sony we are ready for Killzone Mercenaries 2 on vita...
The only thing I beg the industry not to do, is no more fake In Engine Real Time gameplay videos and I hope a lot of the games that we'll watch on E3 to release sometime in the next 6 months no more delays please
Finally possibly we will get bored with VR tech, because I believe that Sony will devote a lot of time for Morpheus in its presentation, because of the Oculus presentation that will happen before E3