Well, sounds great. I hadn't thought of racing on power lines, or there being power lines overhead in the first place, so I'm not sure how I feel about it. I only bring it up because underground cables make things less cluttered. There could be power cables from the generators to the chasms of Onu-Congro and Ba-Congro though, so there could be cable races in that regard. I still want the Bionicle architecture esthetic though, if you know what I mean.
Otherwise, very promising. Did you make that image yourself, or is there some tool that exists to make Bionicle characters?