So heres a thing..... its a theory i support and tbh makes alot of sense.... if an uchiha was born half senju or uzumaki it gives them a pseudo EMS or some form of EMS. because they have both body and eyes of the sage it creates the perfect balance. The chakra and DNA would be a perfect mix of both so the chakra used on the eyes and the eyes being part of the body as a whole can handle the stress easily. This would mean the power and reserves of such a person would far surpass any uchiha or uzumaki/senju. Sharingan grants easy control of such vast chakra and stamina. anyone born with both eyes and body of the sage would be a considerably formidable opponent for anyone. They wouldnt have rinnegan because specific chakra is required to gain it. But it would give the Mangekyou of said user eternal light. And maybe an even more complete form of izanagi or izanami. The life force of a senju or uzumaki + the power of the uchiha eyes = Massive devastation.
I have created some OC's based on this theory.
before you say shin uchiha crap i just want to let you know shins mangekyou is a product of orochimarus experimentation and also he is not senju dna either because he is not listed as wood style user, shins arm was grafted onto danzo with hashiramas cells to complete the healing process of surgery and to add a powerboost to danzos abilities, if shin was made with hashiramas dna hed be listed as wood style user so no shin uchiha is not a typical case in fact he is not even uchiha in origin. sorry but people who argue shin as a counter case to this theory obviously don't know the facts. Orochimaru stated shin was a failure for a reason also even though his mangekyou is authentic i doubt it is actually his. if orochimaru could reproduce sharingan like that he'd already have a set of his own. sorry but shin uchiha is not a true uchiha.