Crimsonlink
Crimson Champion
I don't think Obito is final villain material, though. And I really don't think the all-powerful Madara would be defeated by Obito of all people. His only real talents are Kamui related jutsu, and Madara should know enough about Obito's MS to be able to avoid getting sucked into the other dimension.
And in my opinion, the Allied Shinobi don't need to be here. There isn't anyone among them who can stand up to Obito or Madara.
I hope the Allied Shinobi alliance gets there and Sakura ends up dying at Madara's hands. That would make up the latest chapters.