if its the case of "making madara scared" and if its possible that the 4th can be resurected, then the 1st hokage will be the best pick considering hes DNA is everywhere and he ACTUALLY beat madara and madara looked up to him for that. so if you got a gut feeling that its the 4th , than theres something wrong because the 1st has a bigger chance mate. but thats not my main point, because it defiantly is NOT any of the hokage, becuase kabuto showed the 6th coffin to madara, then he went to explain that none of the hokage cant be brought back. now if the 6th coffin was the 1st/2nd/3rd/4th hokage dont you think madara will be like "wtf then how did you resurect him, when u say that the hokages cant be resurected" , now tell me do you still have that faulty "gut feeling" of yours !! :flaw: