Emerald City El Diablo by Robbie Busch x Argonaut Resins

The Month of May is going to be quite the Argonaut Resins-fest = first with the impending release of Robbie Busch aka McBoingBoing's 4th Wave of EL DIABLO resin figures. The images previewed here are of the EMERAL CITY Green clear tint = 1 of 5 new Diablos in the wave (numbered 16-20 out of a total 25). What other cool colorways can we expect? ... here are sum hints :p