Riddle Me This!
The WWE website has taken off Riddle's first name and is simply named, "Riddle." No, he will not portray as a fictional supervillain character in Batman. The name change is just a tweak to which Riddle will now be more of a serious character. Here is the comment from Sean Ross Sapp on Fightful:
"It seems as if the match particularly had a big impression on McMahon, as he made the call to change Matt Riddle's in-ring name to "Riddle," and pitched a more serious character presentation. We're told Riddle was supportive of the idea."
Remember, Big E's original name was Big E Langston.