Last year at the Xbox Games Showcase, Xbox revealed 4 new, AAA games coming from their own studios; Forza Motorsport, State of Decay 3, Avowed and of course, Fable.
For this year including XGSP and Bethesda, so far, I do think I already know about 5 completely new, AAA titles being announced this Summer. Some more expected than others.
Plans are still fluctuating though. At the end of the day, I think it is a fair expectation that gameplay trailers and/or demos should have a bigger presence at least for the already announced things coming this and next year.