the bolded part made me feel that i am not reading a fanboys post (no offence just kidding) lol xdYeah, right now BM Naruto would eat EMS Sasuke for breakfast. I don't think Kishi will make any more than two new Mangekyo/Ems Techniques, because the Uchiha are already at such an advantage. Kishi needs to do something to make a balance between the two, and I think Rinnegan would be a good choice xd
and the theory you said it might be possible though there is always a chance of 50/50 and as we know that kishi has always been known to pull things out of nowhere xd