Here’s what Kevin Feige had to say about the joint custody of The Watchers, and how Stan Lee’s post-credit scene came about.
Marvel Studios president Kevin Feige answered that question, but if you want to avoid all SPOILERS, you should stop reading now.
During an interview with /Film, Kevin Feige was asked if Stan Lee’s conversation with the Watchers means he has been the same character in every Marvel movie.
There has been speculation that Stan Lee is actually the Watcher named Uatu, who has been assigned to watch over Earth, but in the actual Guardians 2 credits, he’s listed as The Watchers Informant.