Attached Link: Comics Creators Search for 'Super Hero' Alternative

I think you need to listen to the report at this link. I think if you listen to the report you will find that as long as you use the term "casually" you are ok. It's when you go and use it as the title of a product when you might find some trouble. Especially if it happens to be a comic book! Don't go making a mountain out of a molehill! David