I think this Ohrai poster for ROTJ is a cut above most of the posters, but I’ve never seen it used for a DVD or Blu-ray case. It would be really grand to have a full set of Ohrai Blu-ray cases. Perhaps this more impressionistic take on the well-known poster could be for Empire:
And this classic could be Star Wars:
Heck, there’s even a cool one for TPM: 
Anyway, just an idea. Now that I have posted it, someone will undoubtedly show me that this set has been done.