the other madara , be it limbo or not , is getting sealed by naruto...besides , kakashi used kamui to escape the kamui world once..it's not impossible he can do the opposite , unless he used a clone to kamui himself back to the real worldWait. It doesnt make sense. How can dematerialize to another dimension? Kakashis eye can make distant objects go through another dimension whilst obitos eye can make the wielder go in that dimension. Madara had Kakashi's. Unless it was his limbo version who took the eye and used it on the real Madara.