#1 Braun Strowman
It's no secret that a win against John Cena and Bobby Lashley means something in The WWE and what better way to make Braun Strowman's heel turn look legitimate by having him take out Cena at Super showdown? Not only would it be a great way to help build Strowman as an absolute monster, it takes the sting out of his expected loss at Hell in a Cell.
Of course, this all put Elias in a secondary role to Strowman, but if they use him effectively enough in the match they could at least make Elias a part of it. At least that way, the two heels would share momentum moving forward and would each have a chance to turn that momentum into something greater.
In the end, there is no better momentum gainer then defeating Cena and Lashley in a tag team match and that is exactly why Strowman and Elias are the men for the job. In fact, the match could even go a long way as a passing of the torch moment if WWE is actually willing to give Strowman and Elias a dominant win over Cena and Lashley.