Re: Minato final villain
Before the faces of ALL the Akataski were revealed and we saw God Realms silhouette, Kishi had the chance to make Minato the main Villian and actually it would have been a great plot twist.
Everyone would have thought he was insane and betrayed his Village. Madara could have STILL been the one behind it "controlling" Minato the whole time. He could have used Izanagi for the belief of him saving the village.
To tell you the truth i rather Kushina had left the village in order to join Tobdara (instead of Konan) and wait til the moment was right to free Minato from his control.