The next one will be TIGER FORCE Frostbite & Tiger Cat.
Honestly? That wouldn't be too weird if this year's set was Tiger Force. They did that with Footloose. The year before he was the "free" figure, his head/helmet were used for Claymore in the Special Mission: Brazil 2 set. At least if they did that, and made him a new head and fur/webgear piece (which I hope is a precedent moving forward, at least for the "free membership" figure) that would warrant 2 uses of the mold, and at worst folks could get castings from casters.