#3 Brock Lesnar vs Cain Velasquez to be saved for WrestleMania

Dave Meltzer of The Wrestling Observer recently revealed that Cain Velasquez needs knee surgery, which is why he was forced to wear a knee brace on Friday night when he attacked Brock Lesnar on SmackDown.
Velasquez has already made it clear that he's coming for Brock Lesnar, a man who he has already beaten in the Octagon, but that doesn't mean that the match has to happen straight away. Knee surgery would sideline Velasquez for a number of months and wouldn't even guarantee that he would be recovered in time for WrestleMania 36, but it could be WWE's plan.
With the move over to FOX designed to allow WWE to gain "a real fight feel" WWE could have decided to treat this match like a real fight and a press conference is the way that boxing and MMA matches have been announced over the past few years.
This is easily the biggest crossover match that WWE has ever booked so saving it for WrestleMania could be their best option, rather than giving it away in a few weeks at Crown Jewel.