Bloodborne 2 over Demon Souls for me. I loved them both but Bloodborne was the better of the two IMO. It should have better faction action though.

Also BC for PS2 games similar to X1 with 360 games. It is not a stretch and would get people to quit crying. Most people will still need to rebuy them digital anyway due to all the trade ins people do these days.

New God of War reboot based on Norse Mythology.

Last of Us 2

BC via PSNow streaming (no charge) if you put your PS3 disc into your PS4.

The Order sequel with addressed issues and proof of listening to fan feedback. Seriously the potential is there and if they back it, it could be good.

Final Fantasy 7 remake release date

Shenmu 3 release date and gameplay footage

New IP announcements from 1st party

Legend of Dragoon sequel

There is so much more they could do, but this would win E3 alone.

Sony somehow buys Nintendo and Microsoft's gaming divisions, unifying the console platforms. Not that it's going to happen, but that would probably be bigger than E3 2015.

Santa Monica game, Bend game, Crash game.

I'm liking this one. Some ambitious wishes there but at the same time they are relatively doable.

I would hope they do something with the original LoD game though.

The fact is that going on there will be less and less franchises to revive such as what happened with Shenmue 3 last year, I know remakes are a thing, but let's be honest, FF7 was the most wanted one...
For me they would have to announce Medievil 3 but I know that many people don't know the franchise :v

Announce a first party Vita game ;)

I don't think it's possible to surpass last year's E3. What they can do is show gameplay from Agent, or at least a trailer. And to top it off, showcasing Half Life 3 in their show as a timed console exclusive, while PC gets it a bit later. Of course, not many will like it, many more will like it, collapsing VGC, the Gaf, Twitter, Youtube, Reddit, and several other sites.

C r a s h   B a n d i c o o t

Crash Bandicoot announcement.

Agent (doubtful, but so was TLG - are they specifically pushing to release games that have stalled development or in development hell? Good idea IMO

Crash Bandicoot/Last of Us 2/new ND IP

Full GT7

New Sucker Punch game

New God of War

Titanfall partnership

A slew of Morpheus games and Morpheus-compatible games.

Non-game Morpheus apps, like virtual tours, rollercoaster rides etc

Red Dead 3 reveal

Visceral EA Star Wars reveal

Watch Dogs 2 reveal

Too much for 1 conference there i think, I haven't included new footage of previously announced games.