Minato loses this badly.
WHY:
He cant hurt Raikage because of his raiton cloak and natural durability.
He wouldnt be able to touch Onoki because he will be in the air blitzing him with dust release techniques.
He wont be able to touch Gaara because he will be in the air as well.
Mei will surround herself in acid mist to protect herself from the teleportation sneak attacks.
Tsunade will pulverize all of Minatos seals around her into the ground to keep him away and he wont be able to kill her with physical attacks due to her crazy durability.
Speed is not everything if that were so Minato would have killed Bee when he teleported behind him, but he couldnt because a skilled shinobi knows how to watch their own back.
Agree with all of the points made. Also agree Minato would lose, but whats to stop him from sealing them up (especially Tsunade, most vulnerable)? If he gets Tsunade early (with his speed, very likely), his Kunai are still intact...
Also, it's said he spent 3 years on the Rasengan. If there were other techs of his nature affinity already present, why bother creating a brand new one? I'd say Minato has a fair few powerful techs from atleast 2 nature elements; he just hasnt had to use them as the FTG-Rasengan combo he's used has NEVER been countered in his life...
He'd still lose (probably due to chakra drainage, as they cant possibly do
him any damage), but he'd take down atleast 2/3 Kages with him...:scorps: