HE'S WEILDING DNA!!!! DEATH TO ALL!!!
Anyway, upcoming explanation that Obito was unable to use the sage's power because what the Sage did was FOR the world not against it and that the power that unites and connects is stronger, making Naruto the true sage... or Sasuke... or maybe it's Sasuruto... Naruke? Whatever. That's generally how these things work - you have ultimate power but it was created for good, not evil.
Can we get to Madara now? Please? How about Orochimaru backstab? Sasuke heel turn?
A simple souvenir of someone's kill
And like the sea
I'm constantly changing from calm to ill
Madness fills my heart and soul as if the great divide could swallow me whole
oh, how I'm breaking down