Well ....
Last Guardian PS4.
The hidden IPs from Sony's studious will be displayed, such as the other team at SSM under Stig
Some good news for Vita that may encourage people - software related announcements and price cut in NA.
Revival of some old skool game (or more than one)
Something related to Drake - be it Uncharted 4 on consoles or Vita related. If it is Vita it will have MP/coop
KH3 and FF ... I'm not so bold to presume they will be exclusive lol But 'may' have exclusive content.
Oh and more 'strategic partnerships' between Sony and third parties
And gamers will be most pleased with Sony's offerings at E3
Playstation = The Beast from the East
Sony + Nintendo = WIN! PS3 + PSV + PS4 + Wii U + 3DS