#2 Brock Lesnar
I'm guessing that Brock Lesnar will hold the WWE Championship until April. He may not, but he rarely walks into WrestleMania without gold. The current WWE Champ will either be defending or challenging for titles at the biggest PPV of the year.
Like with Joe, a Lesnar-Kross battle would be a battle of titans. Both men have legit grappling and combat skills which would give any potential showdown a greater sense of legitimacy. I'm not sure the Beast would consider a possible program, but he should.
Corey Graves deleted his Tweet! More details HERE.
Paul Heyman would obviously match wits with Kross on the mic, as Lesnar likes to throw people around; Kross likes to throw people around with mind games. The Beast is going to need some new opponents if he sticks around past April. That isn't a known fact as of this writing because he usually waits until the last minute to come to new deals with the WWE.
If he loses the title between now and WrestleMania, a good non-title program for the Beast would be with a big name. Kross isn't as big a name as Tyson Fury or Cain Velasquez, but he knows the pro wrestling game and how to sell feuds. He's also one of the few stars who could probably throw Lesnar around as much as he throws others around.