hmm ... if you recall there was some uber strong guy named hanzou i think it was and he defeated the 3 sannin ( Jiraiya , Tsunade , Orochimaru ) all by himself. Yet later on we found out that Pein beat this guy by himself. This leads me to believe that in the future i dont know but somehow someway Naruto/Sasuke/Sakura are gonna team up to fight against Pein. The dialogue would be like " if i defeated the guy that beat ur predacessors(spelling) what makes you think u young rats have a chance ? " the motivation would be good too.