Do you guys think that Madara will be shocked when he sees Sasuke? He does look like his brother after all and he has also acquired the EMS. Also, does Sasuke think that "Tobi" is still Madara? Or did he see through the truth through the Zetsu's?
I think Madara will be intrigued by Sasuke, maybe mistake him for Izuna at first glance.. but that's about it. As far as him knowing who Tobi is, from what I've seen, he doesn't know yet.