naruto can use all his modes and sasuke have ems powers. obito dont have the bijues only gedo mazo and rinngan powers and his sharingan. madara have all abilities he have as an edo. sasuke and naruto know tobi jutsu and his weaknesses and obito dont have his mask to protect him.
i think that sasuke and naruto can manipulate tobi and make him send one of naruto clones into his dimention and than he is screwed. madara in other hand is a bit of a problem... who do you think will win?