Is there an issue using popular franchise references in your comic? For example, my comic is about a guy who daydreams a lot and puts himself in the different "universes" of various franchises (like Starwars, Dragonball Z, Harry Potter, etc)
However, I'm not using characters from these franchises, just embedding myself in their worlds...
Any advice would be appreciated 
If you do something similar, share your comic so I can check it out.