Kel-Tec KSG 14+1 12 Ga beast (Although Caleb found an oddity in the firing mechanism. Hopefully that's ironed out in the production version.)
For those who think the Taurus Judge isn't ridiculous enough, you can just get the Raging Judge, chambered in 28ga ("The comfort of .410 buckshot apparently outweighs the gun by several pounds." That is gold right there. No doubt the Raging Judge will allow you shoot even larger donut shaped patterns with slightly larger holes and mediocre velocity. Should sell by the ton.)
Snap! Not only is there a GSG StG 44 in the works, but an MP40 as well.