Nothing is concrete yet, and Collider, the original source, is saying it is only a rumor as well.
Collider is hearing that Matthew Vaughn, the director of Kick-Ass and X-Men: First Class, is in talks with LucasFilm on directing the brand new Star Wars: Episode VII. Collider’s sources have also told them that Episode VII was the main reason why Vaughn left the X-Men: First Class sequel.
Now most of us we’re wondering why Matthew Vaughn deep in pre-production with X-Men: Days of Future Past would he drop out suddenly. Now, we have our answer. When LucasFilms offers you the keys to Star Wars with no influence from George Lucas, this is something you just don’t say no to. After all, a majority of the top directors today will tell you that Star Wars was one of their primary reasons they became a director, and also one of their biggest influences.
I think Matthew Vaughn would be a great choice as the director for the next Star Wars. He did such a fantastic job on X-Men: First Class and Kick-Ass that I think giving him the chance (and time) to develop Episode VII would be a no-brainer. Also, the combination of Vaughn and Jane Goldman would solve any issues with the script. I hope this happens, because like Edgar Wright, he is one of the directors I wish would get more blockbuster projects.