4. Bray Wyatt
Undertaker vs. Wyatt just occurred at Wrestlemania 31, but there is always the desire for a rematch. Wyatt could easily make that storyline work considering he did the entire build-up of their feud himself. Wyatt’s motivation at Mania 31 was to bring back The Deadman from the grave. Now, Wyatt could benefit from being the one to end his career.
It’s a change of heart for Wyatt. However, for The Undertaker to have his final match with the next great dark character of WWE would be such a beautiful way to finish his career. Wyatt would be able to carry that torch for years, and it would elevate him to be only the second man to defeat The Undertaker at Wrestlemania.