Many rumors arise every day about marvel movies. This time, Marvel dispels Deadpool rumor in Doctor Strange 2 because it was necessary! A lot of leaked information turns out to be good for marketing the movie or series. After all, people end up getting more interested in what might actually come. But this time Michael Waldron went public to reveal that there were talks to bring Ryan Reynolds' Deadpool but it didn't go beyond that.
Yes, we talked about it. I think we talked about everything in this movie. So it would be crazy not to bring it up, but at the end of the day it didn't feel… It just didn't feel like the right place. But yeah, of course we talked about it.
So, yes, there was a time when it could happen. But soon after they realized that it wouldn't fit to have Deadpool in Doctor Strange in the multiverse of madness.