The promo picture at summerslam suggests that he is returning as the deadman, thought i would just bring that up as a discussion.
And so does the SummerSlam website. Did anyone honestly believe that he would be back with the biker gimmick? Face it as much as internet fans claim to like that gimmick, and trust me when I say that there are plenty that will argue against it, it's just fact that the biker wouldn't be as over as the Deadman.
I don't expect to see him back until the match at SS, maybe some mind games on SmackDown but not an actual appearance.