Sasuke wont defeat Madara . All the Uchiha clan want power that is why Konoha wanted to killed them all . Only Itachi si good from their clan Sasuke is the same as Madara . This ANIME is CALLED NARUTO FOR A REASON. IT IT WAS CALLED SASUKE THEN YES MAYBE Sasuke will Defeat Madara but no IT IS NARUTO . U cant say the top 10 mos powerful Ninjas without seeing Minato to fight with Madara only the SO6P is Number one but this is not sure too . At the END of anime we will see and who knows maybe Naruto will SURPASS EVERYONE.