During his Hall of Fame podcast, Booker T predicts fans could see The Undertaker in action one last time, although he doesn’t think it will be at WrestleMania 38.

“People are still wondering if ‘Taker is going to come back for one more,” Booker said. “But I don’t think we are going to see ‘Taker back for this WrestleMania. But I did say, we will see The Undertaker back inside the squared circle before it’s all said and done. At WrestleMania, one more time, that’s my prediction, and normally I am right.”

The last match that 'The Deadman' appeared in was against AJ Styles at WrestleMania 36. They wrestled in a cinematic match called the Boneyard Match. 

FULL MATCH - Undertaker vs. AJ Styles – Boneyard Match: WrestleMania 36 Part 1