As promised, we got the announcement of Marvel Studios Phase 4 at SDCC 2019 (and then some). What's interesting is the studio didn't just announce movies, but upcoming television shows for Disney+ as well. Thanks to the internet, we have a good look at the next two years of the MCU.
While not all of them have specific release dates, we have Black Widow (May 1, 2020), The Falcon and the Winter Soldier (Fall 2020), Eternals (Nov. 6, 2020), Shang-Chi and the Legend of the Ten Rings (Feb. 12, 2021), WandaVision (Spring 2021), Doctor Strange and the Multiverse of Madness (May 7, 2021), Loki (Spring 2021), What If…? (Summer 2021), Hawkeye (Fall 2021), and Thor: Love and Thunder (Nov. 5, 2021).
Here's also a clearer look at the logos (save for What If...?):
In case you haven't been doing your research, the only properties that didn't get a specific release dates are the upcoming MCU shows for Disney+. Unlike Agents of SHIELD or anything that came with Marvel Netflix, these shows promise to have real stakes when it comes to the MCU at large. Marvel Studios will be working closely with the series, and we'll also be having heavy involvement from Kevin Feige himself as well as the original actors.
There were also some other films announced to be in development, but the closest one without a release date in Blade. The panel though, has confirmed that the sequels for Black Panther and Captain Marvel are in the works, and development has already started for Fantastic Four.
For now, the first movie set to come out for MCU Phase 4 is Black Widow, and it's set for a release on May 1, 2020.
See Also: Black Widow SDCC Footage Description Teases MCU's Biggest Mystery