Pretend to know what's coming? Black Widow and The Eternals are scheduled to film this year. They could choose not to release them. It be really weird if Marvel Studios shows a blank screen for 2 hours, but if it sells then that could be the biggest money maker yet. That puts any X-Men movie back to 2021 at the earliest. Any potential X-Men/F4 movie currently is without a script, director, and will probably require a long casting process to make sure they get all these marquee characters correct. They won't haphazardly reboot the characters just for speed. Meanwhile...
Black Panther 2 - Ryan Coogler was announced as the director, he's also writing it, and reports had it initially eyeing to film late this year or early 2020. So far it's not scheduled to film this year (probably because the script isn't done):
https://www.hollywoodreporter.com/h...er-2-ryan-coogler-write-direct-sequel-1151626
Doctor Strange 2 - We know Scott Derrickson is back to direct:
https://www.hollywoodreporter.com/h...e-2-scott-derrickson-returning-direct-1168156 and if you trust the guys over at ThatHashTagshow they are bringing back the original screen writer:
http://thathashtagshow.com/2019/01/25/exclusive-c-robert-cargill-penning-the-doctor-strange-sequel/ which makes sense given he and Scott Derickson have been open about the plans for the sequel.
Shang-Chi - Destin Daniel Cretton is directing and Dave Callaham is writing the script. This was just announced, and it will require a lot more casting working than the previous two movies.
https://variety.com/2019/film/news/...el-cretton-marvel-asian-superhero-1203162631/
Guardians Vol 3 - Script is done. Gunn is directing. It was set to film this year but we know what happened. It's now set to film in 2021 because he's doing it after Suicide Squad. It will 100% be released in 2022, so its getting a spot.
The 2021 slate doesn't feature a July movie. They could do an X-Men movie then but that could also be earmarked for Spider-Man (Homecoming July 17, Far From Home July 19). You don't have to believe me but those movies are happening.