4. Chris Jericho
What on earth was Jericho's appearance at Night of Champions all about? He showed up as Reigns and Ambrose's mystery partner, cost them the match with an ill-advised blind tag, and stormed out of the ring in a bad mood. A heel turn seemed to be on the horizon, only for Y2J to turn up the recent Madison Square Garden show as much of a babyface as ever - losing valiantly to Kevin Owens in the process. Hell in a Cell could be the time to finally tie up this curious loose-end, perhaps with an assault on one of his newfound buddies. Roman Reigns' match with Bray Wyatt is surely the site of a more shocking run-in than Y2J (more on that later), but with Ambrose yet to be booked on the card, his eventual match could be the perfect stage for another Chris Jericho heel turn. Of course, this being WWE, Y2J's behaviour at Night of Champions could just never be mentioned again, and we'd be expected to forget all about it.