#1 The Fiend calls Brock Lesnar to SmackDown for the ultimate confrontation
Even if you run a cursory scan on Twitter for The Fiend vs. Brock Lesnar, you will see that there are way too many fans that want the fantasy match to actually take place. Now, we do know that Brock Lesnar is slated to make a WWE return very soon indeed but everyone is currently under the impression that it will be to RAW and not SmackDown. But I can totally imagine Brock Lesnar coming to SmackDown for the ultimate confrontation.
While RAW is loaded with talent from Seth Rollins to Drew McIntyre to Bobby Lashley to Randy Orton and Rey Mysterio, SmackDown lacks that one big name with the departure of Roman Reigns. Not only could Brock Lesnar fill the void, Brock Lesnar vs. The Fiend would be a match that would be impossible to predict because of the unbeatable nature of both of these characters.
In fact, the build could start on SmackDown now and the match could play out at SummerSlam 2020.