I know this is a far-fetch prediction and a 99.99% that it will not happen... but anyways i just want to share what's in my mind today..
After sasuke knows about everything and the secrets behind the scroll he will immediately join to the battlefield but oro will follow sasuke because he want's his precious sasuke alive... When naruto in complete BM release his last/final and powerful attack to madara sasuke will interrupt and he will block naruto's attack to save madara because he want something from his ancestor... and then sasuke will challenge naruto... and oro upon seeing edo-madara will become interested to join the battlefield and will try to control edo-madara...
After sasuke knows about everything and the secrets behind the scroll he will immediately join to the battlefield but oro will follow sasuke because he want's his precious sasuke alive... When naruto in complete BM release his last/final and powerful attack to madara sasuke will interrupt and he will block naruto's attack to save madara because he want something from his ancestor... and then sasuke will challenge naruto... and oro upon seeing edo-madara will become interested to join the battlefield and will try to control edo-madara...
