#1 John Cena: Rey Mysterio and Samoa Joe

If everything does go according to the script then John Cena will finally face Undertaker at WrestleMania. The build-up for this dream match will be done on Tuesdays as SmackDown Live is lacking a big-name feud heading into the show.
Cena's misleading promo on Raw, Undertaker playing coy regarding the match at a recent fundraiser, and reports from Wrestling Observer all but confirm the dream match happening at the stage it should have years ago.
Look who just shut down all of Tony Khan's critics! More HERE.
The ambiguity still remains though and WWE has a bunch of ideas to work with on the drawing board. Cena pitched matches against Rey Mysterio and Samoa Joe to creative, which were both reportedly shot down for the Taker bout.
Mysterio is still in contention to go up against the Cenation leader yet again despite suffering an untimely injury at an indie show. But as things stand, Taker vs Cena is a certain lock for 'Mania.