To play devil's adovate, Roman Imperialism is quite a bit different then American Imperialism. Americans like to maintain military bases, exert influence from the shadows, and wage proxy wars without fully occupying foreign territory.
BTW Disney is too chicken to do this. LOL, not going to happen.
http://www.huffingtonpost.ca/entry/frozen-director-elsa-girlfriend_us_5a9388c5e4b01e9e56bd1ead