You are completely forgetting the scroll dude, and just to let you know the Juubi has the sharingan, so there has to be some way Sasuke can try to take control of the beast.
He is the only other Uchiha with the EMS, and just to let you know, he is the youngest Uchiha to awaken the sharingan and also the youngest Uchiha to acquire the EMS.
Yet from all of the manga info we have we know for certain that sharingan doesn't make you a sensory ninja. Sasuke has absolutely no idea where naruto and co. are nor is their current location a place sasuke knows well. Unless they just happen to walk past on their little adventure they aren't turning up any time soon.
Since Madara is a villain, he will be stopped due to PNJ. So, I am sure Madara would rather lose honourably to another fellow Uchiha, an EMS user like Sasuke than to get defeated by Senju cousins lol.
It makes no sense why people believe Naruto will be the one to end the curse of hatred, your looking at it wrong; it's not about sasuke saving Naruto it's about him breaking the curse.
