I predict the Fourth Shinobi World War will end like this:
Shinigami will kill Naruto and Sasuke, revived Kages will be morphed into Narutomaki, then Sakura will go rage mode: she gains the Rinnegan and Sharingan, grows a third eye with Byakugan, goes sage mode, then kills obito, then absorbs him to defeat Madara. Nuff said