“The unfortunate truth is you don’t, and therefore you need to make sure that the experience itself works, regardless of what has been spoiled or not. We still do as good a job as we can and I think a lot of people are getting good at not spreading it. You know somebody steals something, don’t spread it around because it just potentially lessens the experience, but in a lot of ways, No Way Home showed that it did not lessen the experience, so we will continue to do the best we can, but the most important thing is delivering the movie or the show that delivers regardless of what you know going in.”

Kevin Feige on Keeping Marvel Cinematic Universe Secrets – Murphy’s Multiverse
During the virtual press conference for Doctor Strange in the Multiverse of Madness, Kevin Feige discussed trying to protect MCU secrets.