Update 9/6/15 with more covers. I now have the current slate of 41 known covers represented.
This October Marvel is releasing Hip-Hoop Variant Covers for 27 different comics. As far as I can tell this is the complete list of covers they will be releasing. I saw reports of there being 50 different covers but that changed to 25, and then I was able to find 31. I’ll update this post with any additional covers if they wind up actually creating them.