I think they'll have a good amount. I'm sure SSM, GG, Team Ico, Team Gravity, and Japan studios could all have some good stuff to show. I would hope for Sucker Punch to show of their next game but it might be too early for that. Also a chance we could see the next Gran Turismo game.
Also maybe Quantic Dreams next game could be there. I feel like Sony has the best shot at surprising and showing off a lot of stuff.