I'm going in with an open mind still, but I worry that if the James Gunn-directed finale to the Guardians of the Galaxy story doesn't even live up to tempered modern MCU expectations, the MCU franchise is done long-term. At least as we know it now. I wouldn't be surprised it there started to be reboot talks at that point.
Thor, Spider-Man, Doctor Strange, Ant-Man, Black Panther, and Guardians of the Galaxy have now all gotten movies since Endgame, and people can only consistently muster up excitement for maybe 3 of these.