#2 The Demon vs The Fiend
The last time we saw Balor on WWE programming was at SummerSlam, when he got absolutely mauled by The Fiend. It was Bray Wyatt's first match back and it was booked to perfection.
Once Balor returns, there is a possibility that he could be out for revenge. The Extraordinary Man unleashed the Demon on Wyatt back at SummerSlam 2017, so this year's events proved to be payback for the former cult leader.
With each of their alter egos gaining victories over the other, the stage could be set for an epic blow-off. Balor could transfer over to Raw in the rumored upcoming WWE Draft and challenge the Fiend to a clash against the Demon at a place like Survivor Series. It could even be for the Universal Championship if the Fiend does have a Hell in a Cell match for the title next month. However, a match like this would mean that Balor's face painted alter-ego must lose.
The logic of the Demon has been flawed for a while, with Balor using it against Bobby Lashley and Andrade, but not against Brock Lesnar. Perhaps, a first main roster defeat for the Demon could spark a rebirth of sorts and make Balor even stronger.