4 great wrestlers The Undertaker has not faced at WrestleMania yet

#3 Sting

Sting vs The Undertaker would have been amazing

Both these wrestlers have a certain amount of mysticism about them. Sting is widely regarded as one of the greatest wrestlers of all time. But his dying devotion to WCW made him one of the very few wrestlers to have never appeared for the company, until 2014.

The WWE Universe has never seen a Sting vs The Undertaker match on television. Sting did fight Mark Callaway in his pre-Undertaker gimmick at WCW. When Sting debuted on WWE in 2014, stakes were high that both these superstars will face off against each other at WrestleMania but Sting's appearance was used to push Seth Rollins and a feud with Triple H. Reports say that Sting almost reached an agreement with WWE on a potential WrestleMania match against The Undertaker at WrestleMania XXVII.