I just put up a thread that Madara and Kakashi's Sharingan abilties are same that is to control dimension and it just struck me that, kakashi got his sharingan from obito, and both madara and kakashi have both similar abilities they could be a sharingan form the same person and as Madara possess sharingan in his left eye and kakashi possess a sharingan in the right eye it may be possible.
I know this type of thread may have been put up many times but i don't think this fact have been put up so plz cosider the fact and reply.