#4. Having the Demon King lose
Finn Balor will officially be debuting the Demon King at WrestleMania. While that's all well and good, hopefully, it ends with Balor squashing Bobby Lashley with relative ease, similar to how Balor squashed Baron Corbin at SummerSlam last year when unexpectedly entering as The Demon King.
However, main roster booking isn't always the best, and with the Intercontinental Championship just changing hands constantly, WWE might feel the need to put it on Lashley even post-WrestleMania.
The Demon is Balor's most protected character and having him lose would not only affect him, but it would ruin the mystique of The Demon. Especially given that he will be debuting the Demon at the show of shows, which is meant for a WrestleMania, it would certainly be a horrible and controversial decision, but one that Vince McMahon and co are very much capable of making.
Their booking of Balor since his return two years ago certainly doesn't entail trust from fans.