We at least know that IWM has 12 of the new designs lined up. Released so far Shadow Hawk, Ostscout, and Wasp. Coming up is the Valkyrie. Beyond that IWM is rather tight lipped.
Randall also rumored that the next box set will contain the classics. No official announcement, but at least its an official rumor. My guess is the core classics will mostly be released in plastic before they hit metal. Can't wait to see what IWM has coming up for Q3/4.