Well it doesn't make a lot of sense for both Sony and Guerrilla to talk about an other game PS4 game when they have Killzone 4 to promote for launch.
Media Molecule also seems a better fit for Gamescom, they're trying to do something more creative and it needs more space to be understood, something they can't have at E3 considering the amount of things they have to talk about.
Santa Monica and Naughty Dog both seem very comfortable and well fit for E3 events
I'd be disappointed if after promoting TLOU, Naughty Dog didn't show what's next even if it's just a 'vision trailer' like the Uncharted 2006 trailer.
Quantic Dream has already showcased something about their new PS4 game/technology so maybe now they're ready for the next step (notwithstading the fact that Beyond could be a PS4 launch window title as well...its release has been delayed for business reasons).
And let's not forget about Ready at Dawn.
Wasn't Nariko featured in a sizzle reel for PS4 in February - the recent announcement of a movie as well confirms renewed interest in the franchise.
Factor in an appearance by the head of Ninja Theory in the PS4 developer video and we could potentially be looking at a sequel to Heavenly Sword very soon.
I was thinking about these things as well.
Too many coincidences, also Tameem Antoniades was in the official PS4 developer trailers among with Yamauchi, Stig Asmussen and others. He seemed a bit out of place...unless...
Maybe they're really trying to give HS an other chance? Although it's not something that Sony usually tends to do, when they're done with something...they're usually done
I think I can investigate on this
I don't know if I'll be successful though =)