The Undertaker
WWE Superstar: The Undertaker (Ministry Era)
Movie Character: Lord Voldemort
Movie(s): The Harry Potter Franchise
The Reasoning: At some point during the Attitude Era, The Undertaker began collecting followers, forcing them to do his bidding, including but not limited to; kidnapping fellow Superstars, terrorizing the locker room and marking the scenes of his crimes with his symbols. Oh, and he began to refer to himself as "The Lord of Darkness". This is the same undead Wizard Undertaker, who had powers that nobody else did, who had returned on numerous occasions, despite being buried alive.
Sound familiar? Ring any bells? The Dark Lord? His Death Eaters? Launching the dark mark into the sky?
Was the Undertaker's urn actually a Horcrux?