Honorable Mention: Brock Lesnar
Although it won’t happen, but involving Brock Lesnar in the match would make it more special. With the addition of Braun Strowman, Wyatt Family is stronger than ever.
In this case, Lesnar being on Team Undertaker would be a nice addition (imagine Lesnar & Strowman face to face). Also, Lesnar left Hell in a Cell 2015 as a heel (at least for Undertaker fans). This would be a nice way to turn him babyface.