EOnline confirms Jeffrey Dean Morgan NOT returning to Supernatural in 6.21

EOnline confirms what we had previously confirmed on Twitter and Facebook, which is that Jeffrey Dean Morgan will not be returning to Supernatural in episode 6.21 as is reported on imdb.com.

Robin: So the Supernatural fandom is all a-twitter about IMDB listing Jeffrey Dean Morgan as a castmember on the season finale, any truth to that? I would think that if he was really going to make a guest appearance they would do everything possible to keep it a secret.
Sources close to the show tell us that there is no truth to that rumor, despite what IMDB says. Now, tell us how you're feeling about JDM being a no-go. We're here to listen.