I found this one in an old sketchbook. I can't say with absolute certainty, but I'm pretty sure this was probably done before the first animated series was produced, quite possibly during our first visit to Fred Wolf's offices.
Kevin and I each did a number of conceptual sketches to try to visually flesh out some of the ideas in the treatment for the new show that we were shown when we went out there. This proto-Rocksteady was likely one of them. -- PL