Makes sense that Walmart is behind the awful covers. That's a cool bit of info I never knew. The real travesty is that studio's have already paid good money for some incredible artwork with a lot of these theatrical posters. VHS nailed it by using the theatrical posters but once we got to DVD's and the emergence of digital editing everything went south quick. I do feel bad for all the Twilight lover's that got duped into buying this but who knows, maybe we ended up making a few converts.
I'm trying to use original posters for my slipcovers but this fan art was an exception. I totally agree it gives off Gunslinger vibes from The Dark Tower series and I've always been a huge fan of comic art.
I love your idea of crappy physical media art! The only real downside is that I have to buy these rotting turds to feature them haha. My wife and I are usually hitting up flea markets and garage sales so we come across a lot of those awful bootlegs you mentioned. Might be worth the laugh to start picking up some of the worst offenders.