Re: Who would win.....
Itachi vs Minato is a much worthier fight than Itachi vs Jiraiya.
Certainly Minato can escape Amaterasu by teleporting out of its way, however Itachi is a super genius, he would realise the kunai are where he's teleporting, and as such put black flames around them all, however we know Itachi can't use amaterasu well or for massive periods of times, leaving him with his better MS tech tsukyomi.
Now, Minato probably knows quite a bit about sharingan, and i don't know if Minato would look Itachi dead in the eyes, if he did however, Minato loses. Tsukyomi beats Minato hands down.
susanou with yatas mirror and sword certainly makes it interesting.
Personally Minato is fast enough to continuously escape threats from Itachi and wait until Itachi is worn out.
I'd like to see this fight. I'd put my money on Itachi, but I can see Minato winning as well. Very very close fight.