After seeing the Gearhead episode of The Batman (2004), I've become convinced he'd work in some way or another on Batwheels. I mean, his whole concept on the 2004 show was that of a thrill seeker with the ability to transform cars via nanotechnology. He was pretty much just a cybernetic speed racer, and that concept really works for me. I'm not sure how well it'd translate to a show for young kids like Batwheels, but I know Gearhead and Batwheels mesh very well together (at least in theory, anyways).
Batwheels might not be able to handle this kind of topic (not trying to be rude when I say that; just expressing a gut instinct my brain feels), but here's my pitch for a Gearhead apperance in Batwheels: he's one of the only supervillians who's aware of the cars and machines sentience. When he tries to hack into one of the batman's vehicles, he learns of the cars sentience. He doesn't really have any ability to harm the vehicles, since batman's vehicles (and the rest of batman's rogues's vehicles) are probably pretty well guarded. So in the end, I feel he'd become the token "crazy" in the rogues gallery, the weirdo convinced that vehicles are talking.
And my concept doesn't really work on a show for young kids, I don't think. It probably would work in a fanfic or a show targeted at older kids and teens, though. So if Batwheels ever wants to branch out into the older market years from now...well, I think I may have an idea that affords them the opportunity to do that. Gearhead is the ticket to other people learning these vehicles have sentience, and I'll stand by that sentiment. I don't know who could play a villian like gearhead in a new DC show. For what it's worth, I'd want either the original voice actor from the 2004 show to come back, or I'd maybe consider an acting with experience doing racing tv shows or movies. Because there's a good amount of those out there already, so it can't be impossible to find someone.