We've recently found a release date for the Iron Kong PK: August 2016. It's up for pre-order in all the usual places. They've also announced a ton of rereleases for May. The Godos, Pteras Bomber, Molga & Molga Canory, Red Horn, Buster Tortoise, and Lightning Saix. This may be the first Red Horn re-release, atleast that we can remember. May well be worth picking up some of these earlier kits!
They've also put the HMM Berserk Furher and Shadow Fox up for pre-order in April. With the last pre-order, the ZA Mugen Liger, the list has gotten huge! Most are re-releases, but still.