This is going to be a one sided thread against Danzo...however I agree with the Minato winning logic. Minato figured out from the get go that the masked man was Madara when he controled the Kyuubi and also figured out how to pull off a hit on him with his Rasengan. I'm sure he'd be able to figure out Izanagi and be able to keep fighting him for the ten minute it takes for Danzo to loose that affect and take him out.