Orbots was created and animated by TMS, who created GodMars. They just took a toy design they already created and built a new show around it, aimed exclusively at a western audience and sensibilities. TMS isn't going to sue themselves. And yeah, Tonka sued TMS and won, thereby getting an infinitely superior cartoon taken off the air and keeping the toys off the shelves. Even though there was literally no similarity between the completely shitty Hanna-Barbera GoBots and the utterly amazing TMS Mighty Orbots whatsoever.