Hulk Hogan was billed to be prominently featured. However, on July 23, 2015, WWE terminated their contract with Hogan due to racist comments, leaving speculation as to his appearance in the film.
The Undertaker's longtime manager, William Moody, does not make any appearances in this television animated film due to his passing three years earlier. He was best known as "Paul Bearer".
Characters visible in the stadium audience include the waitress from Scooby-Doo! WrestleMania Mystery (2014) and Laura from Scooby-Doo und die Außerirdischen (2000).