I think the question is: How will Madara be defeated...? Sasuke to the rescue? As I've said in other posts, Madara is too awesome.
I can't understand why they can't trade eyes before they're blinded. I mean, you get MS, I've got MS. I switch eyes before I go blind with you and we both have blindness free MS...? HUH? Let me go re-read the the post.