The date was also part of an earlier rumor, but Cosmic Book News claims that a second source has collaborated the date.
A May 29 release does put a few weeks time between the release of Episode VII and The Avengers 2, which is currently set for May 1 that year. And other studios are certainly planning like that’s the case, although a May release date for a Star Wars movie is always a pretty safe assumption.
While we’re on the topic of The Avengers sequels, Marvel confirmed yesterday that Robert Downey Jr. will be back as Tony Stark for The Avengers 2 and 3, and they took a page from Lucasfilm’s book to do it.