Hello, I had a problem myself with a video game editor (I can't tell wich one), and I was so scared that I re-did all my shop with new items :-(
I had no idea I was breaking the law, espiaclly because I'm French and I thought the rules were more tolerant with copyright (but maybe I'm wrong here) and also because there are so many items inspired by films, video games comics... on Etsy ; I thought it was OK.
I hope you won't have the same issues than me. I will continue to support your shops :-)