Three clues that WWE are planning AJ Styles vs The Undertaker at Wrestlemania

#1 Vince McMahon storyline has echoes of Undertaker vs Randy Orton from 2005

Vince McMahon challenges AJ Styles to be more aggressive

Finally, the biggest clue that we have regarding a possible AJ Styles versus The Undertaker match at Wrestlemania is that the current Vince McMahon/Styles storyline bears more than a passing resemblance to a story WWE told with Randy Orton, ironically enough, way back in 2005.

At the time, Orton was coming off decisive World title defeats to former mentor, Triple H and was left directionless and dispirited in storyline (and likely in real life too, as his main event push was botched and his spot in the Wrestlemania 21 headliner was taken by Batista instead).

Cue, the appearance of WWE Hall of Famer and former WWE Champion, Superstar Billy Graham who appeared on Raw to inspire and light a fire in the depressed Orton and boldly challenged the youngster to "go where no wrestler had gone before." Orton took the advice on board and subsequently vowed to end The Undertaker's Wrestlemania undefeated streak.

Randy Orton came within a whisker of defeating Undertaker at Wrestlemania 21

Orton came within a millisecond of defeating the "Deadman" at Wrestlemania 21 when he reversed a chokeslam into an RKO. Billy Graham's pep talk is eerily similar to McMahon's appeal to AJ Styles on Smackdown, wherein the CEO told Styles that he had "gone soft."

Superstar Billy Graham appealed to Orton "to go where no one had gone before"

Styles responded by laying out McMahon and has been linked with WWE's boss in the storyline ever since. Suffice to say that McMahon does not work with stars on television without big plans in their future.

Could WWE be revisiting their own storylines and setting Styles up to face The Undertaker? It remains to be seen but in the opinion of this writer, Styles/Undertaker will be one of the featured bouts at Wrestlemania 35.