3. Brock Lesnar staying after WrestleMania
It is still not known if Brock Lesnar will re-sign with the WWE after his match at WrestleMania or leave the company to pursue other things, but there is no doubt that he has the most lavish contract in the whole of WWE.
There have been rumors about Lesnar wanting to go back to the UFC to fight Daniel Cormier. But with Cormier suffering multiple injuries during his last fight, he is taking some time off. So Lesnar might stay with the WWE for a bit longer.
Brock Lesnar is a huge draw for the WWE, and Vince McMahon will have no objection in retaining him with the same contract benefits. However, this may mean that he will keep the title for a bit longer.
If Lesnar decides to stay with the company after WrestleMania, then it is almost guaranteed that he will beat Rollins and retain the title.