If Kishi wanted to show that trio, Tenten is the last one he'd show.i mean who with the scroll is tenten and who repelled that huge blast is neji . neji is not jounin for nothing. the three shadows are tenten gai and lee.i went to the futere with my space/time jutsu there is no doubt about it
I'm fairly certain it's Naruto given another recollection. At the very beginning of Naruto when Kakashi summons his hounds to catch Zabuza, he pulls out his summoning scroll (which he keeps in his flak jacket) and drags his bloody thumb across it. I have a feeling that in order for there to be summons, in many cases there must be a human that carries that summoning contract like those two cases. Orochimaru had a tattoo, but I haven't seen Tsunade and Sasuke with either. It may simply depend on the summoner/summons contract. Minato didn't need one because Jiraiya carried it. With both of them dead, the responsibility falls to Naruto. It's Naruto's contract, and I'm sure that his and Ma/Pa toads' blood will go on it to summon this third super toad. The alternative is a contract that can be summoned. Personally I think that the toad contract scroll is more versatile than just a contract.
If all we're going to talk about is the same thing we need new theories, angles, bents, or it gets old.
Naruto has time to get his uniform and ninja gear. He did when he was training FRS, I don't think it's that hard or big a deal.