I could do that. I might also make a new outfit for Sun. I have a new character named Nemrac, who resembles Carmen in her Team Outfit, except she has sunglasses, a Lightning on her head, and purple eyes. I have a Grindor outfit for Jolien, a Megatron outfit for Rosa, and a Starscream outfit for Alex.
As for karts and bikes, I have some ideas for vehicles: the Jet Streaker kart, the Panda motorbike, the Wyvern Watcher kart, the Water Glider kart, the Flame Flyer motorbike, the Viper Vinidcator motorbike, the Daredevil motorbike, the Lowtricker kart, the Diablo kart, and the Pedal motorbike.