Technically no, but keep this in mind... by
World-Jumper
on 2013-03-06 20:52:00 UTC
Reply
As with all fiction, everything you do has to make sense, somehow. If, using your example continuums, the main world is LotR and the characters are reading Harry Potter, that would probably not be a good idea, and would have to be a crossover to work at all. If it is the inverse on the other hand, as you said, then it should be fine, and could be interesting. It all depends on setting. But no, to answer your question, it is not a crossover.
Then again, if it is going to be posted somewhere like fanfiction.net, you might want to call it a crossover, or have the two continuum listed in the tags, so that people trying to read a fic purely about the main world are not confused. Just an idea.