Oh, I don't know. Speaking as an bbb artist, angst and h/c does not necessarily scare me off from wanting to create art. Speaking as a beta reader who is also an artist, I beta-ed for a fairly heavily h/c fic (lots of hurt - but most remembered, only some current, heavy on the comfort and it all ended happily!) that I could have created a number of different art pieces for - and one I am looking forward to seeing if the artist who claimed it saw what I saw as I read it.

I've never created a mix, but I looking at the huge list of bbb summaries, and all of them have been claimed and lots have been double claimed for both art and mixes. So I wouldn't worry your story idea wouldn't have people interested!

:D