From an interview:
These are based on the comic books, but we’re going to throw in one or two nods to the cartoon.Relatedly, NECA just announced SDCC-exclusive TMNT and villain figures.
Going forward, a mini Technodrome is something that doesn’t really fit with what we’re doing, but the ones I want to do further down the line are Rocksteady, Bebop and Krang. Now the cool thing that I want to do is that while these were not characters in the comics, I want to approach them as if they were from the comics.
So they would look like you remember them from the cartoon show, but they would have a, and I hate to use this term, gritty look to them.