Next Arcade Skin?

I noticed that the arcade skins (not the bosses) have the same "ult radius" idk what it's called. They are all around the same length. Mf and Riv are long cones, while hec and sona are kinda rectangular. If hec - jg, riv - top, mf and sona - bot, then the next arcade skin is most likely mid right? Here are some of the possible ones: Azir Cassiopeia Velkoz (rainbow ult) :O ^^^^^ though i think these 3 make better antagonists than protagonists. Lux (?) maybe too long

Possible Non Mid Laners: Shyvana (Ult kinda like hec) Graves (cone) A good one I think for support maybe is Nami her ult c an be like rainbow road from mario kart. https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRMYT6A2NEL9ZuNlSx8NZttuu5ZhCqgmP2veFYgEGJWhwd4LYo5