This question is an example:
It's specifically about an original character, Harry, in an original situation (we're talking book 1).
However, the question is based on or inspired by a concept introduced in the new Fantastic Beasts and Where to Find Them movie.
Another scenario would be reading something on Pottermore, and asking a question about Goblet of Fire based on that reading, not about the Pottermore content itself, but tagging it Pottermore anyway.
There's stuff from the new media in the question, and the answer may reasonably draw upon the new media, but it's technically asking about events in old media or just the "franchise" in general.
So, what should our tagging standards be?