This year's D23 came with some huge announcements. Chief among them was Marvel announcing its inaugural slate of web series for the upcoming Disney+ service. None of these shows will be available until 2020 at the earliest. But we've been given enough information to start speculating as to what they could be about. And, perhaps more importantly, we can theorize as to how they'll tie into the "cinematic" part of the Marvel Cinematic Universe (MCU).