#5 Sami Zayn vs. Shinsuke Nakamura at WrestleMania 37
This WrestleMania match may be a little out of the left-field, but it makes sense. While other prominent SmackDown Superstars have a possible program heading into the event, Sami Zayn and Shinsuke Nakamura both don't have a clear direction.
WWE might as well pair them at WrestleMania, playing off their history with each other. Zayn is way too entertaining to be left off the card, although it would further his conspiracy angle. He should ideally face Kevin Owens at WrestleMania. However, it is possible that KO could continue his feud with Jey Uso.
Meanwhile, Nakamura recently turned face and as a result, has to be on the card simply so the live crowd can sing his theme song again. If it is half as good as their NXT TakeOver classic in Dallas, Sami Zayn vs. Shinsuke Nakamura at WrestleMania 37 will be a success.
#4 Dirty Dawgs vs. Street Profits vs. Alpha Academy vs. Rey and Dominik Mysterio for the SmackDown Tag Team Championship
WWE loves to book multi-team Tag Team Championship matches at WrestleMania. Multiple tag teams on SmackDown could get a spot on the Show of Shows, including the current Champions - Dolph Ziggler and Robert Roode, known as the Dirty Dawgs.
The Street Profits are pursuing their rematch for the SmackDown Tag Team Titles, which they should get before WrestleMania. They could enter the event with the belts but with another couple of teams right beneath them. Otis turned heel last week, and Alpha Academy could become a bigger deal.
Also, Rey and Dominik Mysterio should be on the hunt for gold. The story of the father-son duo trying to capture the tag team titles at Dominik's first WrestleMania is an interesting one. WWE could club all of them together to create an entertaining palette-cleanser for either night of this year's Show Of Shows.