#4 Lesnar costs Goldberg
Back at No Way Out 2004, Goldberg played a hand in costing Brock Lesnar the WWE Championship against Eddie Guerrero. Now, nearly 13 years later, Lesnar could return the favour by ensuring that Goldberg doesn't walk into WrestleMania as the Universal Champion. Would it get a big pop? Sure it would.
Now the problem with this one is that some people feel it wouldn't make sense, however, Lesnar probably doesn't even care about the title at this point. They could make a good story out of the idea that Brock has no interest in the Championship and is instead obsessed with just beating Goldberg once and for all, in order to finally gain a small sense of retribution.
Onto the other two people involved in this match-up.