If Minato got his arm back?

[toviasrepier]

Well he could have made a shadow clone to go with Naruto to fight Madara and could have sealed Madara before he revived himself. Minato speed would be what changed the story, by the time Obito got controlled by Black Zetsu and forms the seal to revive Madara, Minato would already have him sealed. At least that's how I see it since Obito was talking for a bit with Kakashi before Black Zetsu came and Minato could blitz to where Madara is.

If following logic that would be the case but seeing Kishi the author (an ultimate Uchiha fanboy and a troll) He will cut his arm again.

 

[Champ]

Same thing happened to Tobirama would happen to Minato