Edo Madara vs Edo Itachi would definitly be a sight to see. Madara would be like, oh sh!t is that Tutsuka's(sp) sword and Yata's mirror? Impressive! Lets see how you deal with my Rinnegan and falling asteroids. It would/should be Itachi vs Saskue times 10. The entire fight they'd just stand there and stare at each other.