Yeah so, as it turns out Moose showcased the fourth wave of the line at this year's NYTF. I've only recently discovered this fact, but wow were the new reveals a whopper. The fourth wave is going to consist entirely of extreme dinosaur esc characters with chomping jaw action. Not only that, but it seems like Blazagon and Thrash have become the poster boys of the line.
https://youtu.be/VJkdq9CkU7E