As much as I'd love to see these cards in print, I wouldn't bother to tread those waters. The creators may have been complete and total con men, but the fact remains that they created (or obtained) a unique design, and a copyright need not be registered to be enforceable, though it certainly helps. Screw them, don't give them any leverage whatsoever to make money on their designs and make something more unique, in a different style that's adequately different from what they did to be in no way an unauthorized use of their copyright.
I'm still waiting to hear the results of the case the New York Attorney General's office has against that guy.
Even better, if you REALLY want to attract attention and make people happy, create a one-stop site for filing complaints against creators who rip off their backers. You receive their complaint, log the amount invested and the reward promised, create a form letter to send to the appropriate legal authority and sign everyone's name to it on their behalf. That right there could do more to make decks like this see the light of day more than anything else - or at the least make the ripped-off backers whole. Law enforcement is a little slow at times to get caught up on social websites, but they're being brought up to speed more and more with every new fraud case that takes place in that Wild West that we all know as Kickstarter. Charge a small fee to cover expenses and you're golden.