I don't see how it violates the rules.
Would you specify ? (:
Entrant must follow the instructions on the Contest Site and submit the completed entry of an original artwork that depicts a unique Scribblenauts version of any character(s) from the DC Comics universe, in any environment. Entrant must provide the name of the character(s) and the name of a DC comic where the character(s) appears. Consult the Contest Site for examples of DC characters.