Kevin Feige said that they had 5 years of stuff planned out and that it was Phase 4 and 5. So I'm led to believe that the slate we saw is basically all of phase 4 minus an Avengers bookend and maybe another movie. Remember all the Disney+ TV shows count as part of the MCU.
As for what Avengers 5 could be. Unless they reveal fantastic 4 and/or x-men characters somewhere outside of their own movies (like in Dr. Strange 2 or Eternals), they don't have enough key pieces for Secret Invasion quite yet. Young Avengers is also something they are clearly working towards but some of the key characters don't even have their mentors/parents getting movies or tv shows in phase 4. I can see them doing Secret Invasion as like a Captain Marvel 2 (and basically make it like Avengers 5.5). Or I can see it being the bookend to 5 and having Young Avengers as like an extra movie or even a TV series. IMO this is something they might have to do if they want to develop everything required in a timely matter. Kang still seems like the likely Phase 5 big bad.
I think that Secret Wars is easily the one that I think everyone wants the most, but imo this does not have a chance to be made until Phase 6 Avengers at the earliest.
If they are going to try and stretch that long, they are likely gonna end up losing their audience. By time phase 6 is here that would be like 2024/2025. You will have lost the majority of your actors by then I would guess. ---
Xbox Live User Name - Corrik Currently playing: Division 2