How should medium ambiguous questions be tagged? It's been a comic for the longest but the TV and Movie franchise might be more well known.
As I mentioned in the comments, my feeling is that if the question doesn't pertain to a specific medium, no medium tags should be applied.
To me, adding a medium tag indicates that the OP is restricting the scope of the question to that medium (or mediums, if multiple tags are used).
I think this is consistent with how we've been handling other questions, such as the-walking-dead.