Looking back on this, they had Chloe Zhao tapped to direct and Michael Waldron set to write the film. Zhao had a big disappointment in Eternals, Waldron provided some good writing on Loki, but then some stuff I didn't necessarily love on Multiverse of Madness, although I ultimately liked the film a good deal.
Wonder if Feige just couldn't find the time for this with everything going on with the MCU? But it also seems Kathleen Kennedy can't seem to get a Star Wars movie off the ground. We've now had the Benioff & Weiss trilogy die, Rian Johnson's trilogy die, Rogue Squadron/Patty Jenkins movie die, Feige's movie die, and Taika's I don't even want to happen.
Rogue Squadron had a lot of hope, although after seeing WW1984, idk if Jenkins was capable enough to both direct and write the movie. I'd have felt better if she had a co-writer involved. The biggest loss is Rian Johnson not getting to do his trilogy because of how toxic the fandom is that the movies probably wouldn't make money. Rian is an extremely talented writer and director (along with being a Star Wars fan himself) and I think a self contained trilogy where he controlled the beginning, middle, and end could've been really good. Plus, people couldn't complain about things happening to legacy charters since this would've been a story of his own creation.