Somewhat off topic... but how did they completely nail the concept images for Bebop/Rocksteady, but the Turtles look like butt?
Because Bebop and Rocksteady's original designs are pretty much a warthog and a rhino in mutant human form. The turtles were always heavily stylized to make them more appealing as hero characters. This design for Bebop and Rocksteady is directly in line with the movie's design for the turtles: Realistic depictions of an animal mutated into human form. The movie turtles are much more anatomically accurate to turtle physiology, and as a result they lose the more expressive and anthropomorphized faces of the classic designs.
They're unused, not rejected. No reason to think they won't be used for the characters in the sequel. Why pay twice for concept art of the same characters?
