Kyuubi Naruto would most likely beat Madara here...saying otherwise is like saying Madara could defeat Nagato or Pain and I don't think he can.
Kyuubi Naruto is brutishly strong and cannot be pushed back. I am not aware of anything Madara has that can take him out...other than hype.
To the post above: We do not use assumption as a basis for thought when debating. Use evidence. If you can prove that the Madara without the skills of the Edo we have seen, can use these chains then it can be taken into consideration. If not, then you must go on what you know of Madara.
1. Madara has more knowlage about Rinnegan than Tobi or Nagato.
2. Madara developed Rinnegan, he was first to use it and to learn it secrets.
3. Madara is the most powerfull Uchiha of all times, the most powerfull Dojutsu user.
4. He read full Uchiha tablet.
5. He was even first to discover such a thing as Outer path or Preta path or whatever...
6. He was the one who gave nagato and then Tobi the Rinnegan.
7. If it weren't for Madara no one would have any knowlage or understanding about Rinnegan, it wouldn't even exist anymore..
Peace, Tobi is nowhere near Madaras level in Rinnegan.