Well, they definitely revealing more about the Disney+ titles at D23. I think they'll refrain from talking about it at SDCC. In 2017 I think, they did reveal some of the new actors in Ant-Man and The Wasp and gushed about the upcoming movies. Hmm, maybe the same here, intro a some of the new actors in Black Widow then show a partial line up of movies - basically confirm the ones we know about, but show a fuller line up at D23 with some surprises of what else is in the pipeline. Maybe tease what the theme for the next saga/phase will be. Pretty sure they will take the time to honor Stan Lee.