Skeletons should spawn with spears on Skeleton Horses in Soulsand Valley

Think about it. The update is centered around mounts. The zombie spear zombie horse combo is in the overworld, so the nether should get a counterpart: skeletons riding skeleton horses with spears... In the Soulsand Valley. The place is filled with undead, bones everywhere, it's a perfect fit and would give a more guaranteed way to get a skeleton horse.