I think with both MS and Sony both saying they'll be a bit better at announcing new stuff, I don't expect too many surprises this year. I think really we need to wait until next... and I am having trouble thinking about what else is available... the big studios are working on big games already...
1. Santa Monica - GOW
2. ND - TLOU2
3,. SP - Ghost thingy
4. Guerrilla - Very likely Horizon Dawn 2
5. Insomniac - Spiderman
6. Kojima - Death Stranding
7. MM - Dreams
8. Bend Studio - Days Gone
9. QD - Detroit
So to me this is a bit of a problem for Sony, everything is pretty much announced from their main studios and the studios they rely on for other games. No wonder they were talking about needing more studios...
So what I am expecting perhaps:
1. Maybe Bluepoint is making a game for Sony (another remake but a big one?)
2. Insomniac do have multiple teams, maybe another ratchet and clank game (though I am expecting a resistance HD version at some point).
3. Sumo: Little Big planet ?
But struggling, unless they have two teams at some of the studios, can only see small games or HD remasters being done at this point. As studios finish off their current games and then work on next gen versions.
As someone else mentioned, I expect Deep Down to make a come back and also to see a few more Japanese focussed games coming into play (maybe bloodbourne sequel).
I think MS have the same issue, they are in a worse position and have less studios, so expect them to be paying for 3rd party studios to make stuff... but I think this E3 could be the worse in recent history.