Ok hear me out. This is without knowledge.
Tenten spams as many weapons as she can, 1000's. Minato places seals on the ones he wants, he also has his full bag of kunai. 3rd Kazekage uses magnet release to rain a shitstorm of of weapons on Hashirama and Madara, and can bring them back once he's cut them. Itachi and Sasuke bleed from their eyes anyway so it's not necessary to rain it on them. Minato FTG's near any other weapons and steals a drop of all their blood. He FTG's back and then proceeds to FTG both himself and Hidan back to konoha, where hidan does the ritual and kills all of team 2.
OR
Minato makes 2 clones, death god's Hashirama, Madara and Sasuke right from the start. This leaves 3rd Kazekage, tenten and Hidan to solo Itachi, who is sick. As of yet, there is no credible counter to this scenario.
If you're gonna troll then just leave the thread now.