According to Dave Meltzer in a recent edition of The Wrestling Observer Newsletter, there has been speculation that if there is going to be another person involved in the Shane/Owens/Zayn storyline, it could be either Baron Corbin, Dolph Ziggler or Rusev. All three seem sort of unlikely though for various reasons. The other name that is being thrown around is of course Daniel Bryan.
Bryan’s WWE status remains unchanged as he is still not cleared for any in-ring activity by WWE doctors as of a couple of weeks ago. Bryan has claimed his situation is much improved and he has already gotten clearance from other third party physicians, however, WWE’s medical team remains adamant on their stance. There was an unconfirmed report earlier in the week stating that WWE would have him in the match but it remains to be seen in what capacity WWE will involve him in the match. Another rumor is that he would be named as the special guest referee.
Source: Wrestling Observer Newsletter