I still occasionally get asked for Harry Potter comics, and I know the right answer is "sure, here's BOOKS OF MAGIC," but seriously, what if they do happen.
I know it's unlikely, JKR probably thinks comics are beneath her, like trans people, but if they *do* happen the moral stance is not to carry them. I'm sure it'll cost me money because there are plenty of stores around here and I'm sure at least some of them will go all in on any HP comics.