#2 Brock Lesnar
If the WWE is feeling bold following Crown Jewel, they could instantly throw The Fiend into the hunt for the WWE Championship, presuming Brock Lesnar retains his title at Crown Jewel that is.
The two men have never really had too much of an extended feud, with their only real encounters coming back at the start of 2016 after Bray Wyatt and the rest of the Wyatt Family eliminated Brock Lesnar from the Royal Rumble. Lesnar would get sidetracked by his feud with Dean Ambrose and the rivalry between the two men was simply forgotten about.
The Fiend will need a serious momentum boost if he loses to Rollins at Crown Jewel and having him come out and attack Lesnar on Friday would be the perfect way to do that.
Wyatt would then need to book as Lesnar's equal over the coming months and the WWE would have to handle this rivalry very carefully indeed. Done right though, this could be a huge feud for SmackDown and one that could really help boost their ratings. The Fiend, despite his appalling booking, is still one of the most popular acts in the WWE right now and a WWE title pursuit could be big money if handled correctly.