Let's see, MS will show off Forza 8, which apparently is going to be a showcase.
They will show Halo Infinate, which I hope, and expect, will look amazing.
They will show off Fable, and considering PG are doing it, it will look amazing.
Ninja Theory will show more of Hellblade 2, which looks nuts.
Flight SIM will get a gig, and that is insane looking, and Sony doesnt have anything to compete with that genre wise.
On top of that, possible new games from their other first party games, and whatever other exclusives they have been working on.
Put that with their initial show, and in totality it isnt really going to hard to match or excel what Sony did.