As of this writing, it is believed that Chris Jericho was just trying to get everybody by doing the TNA graphic on the front page of his website, not too long ago. Jericho currently is not interested in doing any wrestling, as he has many other goals ahead of him. If he's to return to the ring, it'll definitely be with WWE.
Other than the already announced JBL vs. Batista rematch for the World Heavyweight Championship, WWE has added two more matches for the Friday Night debut of SmackDown! on UPN. Eddie Guerrero will be taking on Rey Mysterio one more time, while The Legion of Doom (and it is so painful to type that out) will be defending the WWE Tag Teams Championship against MNM.