#5 The Undertaker
The Undertaker's last WWE match and appearance in the WWE was at the Crown Jewel PPV where he tag teamed with Kane against Triple H and Shawn Michaels and lost.
In his few appearances away from the WWE in the last few months, 'Taker has revealed that he will not be wrestling much and has almost confirmed that he may not feature in the Saudi Arabia PPVs
Also Read: WWE News: Artist reveals surprising personal details about The Undertaker
But WrestleMania and The Undertaker have a unique connection, and a Show of Shows without The Deadman in it feels odd.
He could perhaps be Kurt Angle's final opponent in the WWE, having been in a few great matches with him, while a Part II match against his WrestleMania opponent from last year, John Cena, would also be quite interesting for the WWE Universe.