when madara creates a moon on his deathbed we can talk
Nope he wouldn't. SOP6 without the juubi is still strong enough to beat the juubi itself. I doubt madara would be stronger than the juubi assuming it had the 8 and 9 tails in its possession.
Madara already has the Rinnegan, With the Juubi's power backing it you all really think he can't match the sage?
After having his Jinchuuriki extracted, the Sage still had the power to rip the Juubi apart and lock it in a Chibaku Tensei as large as the moon. His power is most likely still above Madara's, even if he becomes the Jinchuuriki of the Juubi.
Madara already has the Rinnegan, With the Juubi's power backing it you all really think he can't match the sage?
Madara w/Juubi = Sage w/Juubi...
...That means you're saying,
Kushina w/Kurama = Naruto w/Kurama.
*Bijuu