On the back of Paulbot's thoughts, Slipstream was a poor offer, she did only have a small part to play and was only a fragment or characteristic of a character who was dripping in G1 legacy: Starscream.

Was there any reason the Build team (I know they had Grimlock and other names amongst them in the English dub) and the rail racer Car Robots combiners were overlooked? Not enough defining time in their series?