I think Sony's announced published games is all Sony's needs for a great show. Really, they have some very high quality looking software coming across a variety of genres. I don't pay much attention to MS news, but only Nintendo seems to rival them in genres whereas every time I check out MS it's one of there main pillars of Halo/Gears/Forza or 3rd party showcases, Ori and Sunset being the only standout titles I would be interesting in. For me, I'm kinda over the hype. I've already spent $500 on a PS4 console and accessories/software. I just want the games now, that I can actually play or at least see a true gameplay vision of. I mean, realistically, I'm still playing BloodBorne almost 2 months after it's debut. I don't need AAA release after AAA release like so many of the forum goers plead for. BloodBorne, TR:R, OliOli, Sound Shapes, Drive Club, TW3, and USF4 will last me through the summer. I honestly just want the stuff announced to turn out well. So for me, Sony has already "won" E3 unless MS or Nintendo gets another Minecraft level exclusive that actually caters to me. So, like 5% chance that happening.
Potentially Amazing games
Rime
No Man's Sky
The Last Guardian
Gravity Rush 2/Remake
Uncharted 4
Ratchet and Clank
Persona 5
Tearaway Unfolded
Potentially Amazing games with very high replay value
No Man's Sky
Street Fighter 5
Tekken 7
Dissidia PS4
The Witness
And this is just games associated with PS. MGS5, Batman:AA, Batlefront, and Tomb Raider are all must-plays for me eventually, with MGS the only one I'll probably need to day one this year. And then we have studios that are just silent for years like Sony Bend, Polyphony digital, Santa Monica, Media Molecule, and Japan Studio. Smaller games we know nothing about but devs have great track records. Third parties I will most assuredly get on PS like FF/KH/DQ/Yakuza/Shonen Games/Tales/Star Ocean/RE/DMC.
I dunno, just seems like it's Sony's ball to drop really. Just show the stuff that looks good, and have a few wow moments to open, mid-way, and end.