Yeah thats exactly what I meant and I don't think Madara actually saw Sasuke's eyes in the last chapter so he doesn't even know Sasuke has it. That could be interesting.
At below. I don't think what Itachi gave Naruto has anything to do with what you said. If that were the case then there wouldn't be a reason for Itachi to say he hopes Naruto will never have to use it or ask Naruto whether he would be willing to kill Sasuke to save Konoha. I think what Itachi gave him was something along the lines of what Itachi did to Sasuke. He gave him something that will be triggered when the time comes and most likely to kill Sasuke if it ever came down to it.
On another note I don't think Kishi will ever make Naruto a match for Sasuke and I hope that Naruto will be getting some power ups well not necessarily power ups but some proper training so he can at least fight properly but I don't think it likely.