So my buddy and I were talking. There has to be some payoff for Bray Wyatt stroking the belt to HHH on Monday night. So, in our perfect scenario this is what happens.
Bray and Lesnar have a bloody, painful match. In the end, whether through his family or just by himself (which I would love) he beats Brock Lesnar. This alone is earth shaking, but the main event ends when Dean Ambrose beats HHH and becomes the World Champion.
On RAW, HHH comes out and starts to talk about how he will have a rematch for his title at Mania, and as he's a few minutes into his blatant abuse of powers, out comes Dean and Roman, who are already happy they're main eventing mania. They get to arguing with HHH, and out come Paul Heyman and Brock Lesnar. Heyman, as Heyman does, points out that the match between Brock and Dean is not getting changed, and that Brock, still deserving a world title shot himself, is going to stop wrestling in protest if he does not get this match.
HHH reluctantly agrees, but as he does, the lights cut out and suddenly the ring is surrounded by the members of the Wyatt family, with Bray standing on the ramp between Brock and the rest of the people in the ring. Bray makes it very clear that, seeing as he beat Brock Lesnar, he deserves a title shot more than he does, and if he doesn't get it, he won't stop wrestling, he will simply take out every single wrestler on the roster until HHH agrees, and he proves it by showing the Leage of Nations, or the Dudley'z, or whoever, beaten to a pulp in the back stage.
HHH faced with this naturally has to agree as well, as losing his top name in Brock, and the rest of his roster because of the Wyatt's, is not best for business. So, he withdraws himself from the rematch and makes the main event at Mania a Fatal Four Way between Brock, Roman, Dean, and Bray... but HHH being the power hungry bastard he is decides that for a match between such monumental stars a normal ref just won't cut it. So he makes himself the special guest referee.