So people continue to downplay Madara,
Nope he won't become stronger, i don't know what people are thinking here, do they believe Madara doesn't possess the rikudo's chakra even though Hagoromo himself stated Madara brought out his chakra by combining Indra and Ashura's chakra meaning all of Madara's chakra from that point on is Rikudo chakra.
Madara: Indra chakra + Ashura's/Hashirama's power + Hagoromo's Yin and Yang chakra's + dual rinnegan with sharingan powers + Juubi/shinju + Kaguya's power.
Sasuke: Indra's chakra + Hagoromo's Yin + Juubi(for this thread) + 1 rinnegan with sharingan powers
you see the difference, Sasuke has 1 rinnegan and a weaker one that kakashi can handle, obito who had rikudo senjutsu and Rikudo chakra and at one point he had the juubi's chakra and other tailed beasts chakra said Madara rinnegan was too much for him and almost lost himself to the rinnegan. Obito only had one of Madara's rinnegan's. Dual rinnegan Madara stated to be unbeatable.
3R JJ Madara>DR JJ Madara>DR Madara>!R JJ Madara
Madara's dual rinnegan>>>>>>>>>>>>Madara single rinnegan=>Sasuke rinnegan.
Op you'll find your answer to the question here.