"Shadow Clone Jutsu!" Uzumaki Naruto yelled, and a clone popped into existence next to him. The two Narutos grinned at each other. "Alright! I did on the first try! After only a half hour too!" He cheered for a few more minutes, before frowning. "But... Mizuki-sensei said he'd meet me here in two hours." He eyed the scroll. "If I show him two jutsu I can get extra credit and beat Sasuke!" He rolled the scroll open more. He scanned the jutsu listed in it, before his eyes landed on a cool looking one. "This jutsu looks so cool! Summoning, Edo Tensei!" He read the hand seals and jumped to perform them.
The Kyuubi, watching from Naruto's eyes, smirked. That jutsu may be an abomination to nature, but his container did need some better protection. But with his pitiful (at least to the Kyuubi) chakra, he'd never be able to summon anything. As such, Kyuubi deemed this situation fit for a little hint of his chakra.
As Naruto neared the last hand seal, he felt an enormous power well up inside him. He ignored it for now, and slammed his hand to the ground. "SUMMONING! EDO TENSEI!" Of course, Naruto did not know that the Edo Tensei required sacrifices. By all laws of jutsu physics, the Edo Tensei shouldn't have worked. However, by some twisted trick of fate Naruto got lucky, and got the only three souls able to be summoned without a sacrifice.
Uchiha Madara was not amused. He had been enjoying a beautiful after life with his brother and family, as they ruled over Konoha. He had felt incredibly tired during a simple dinner, and then, he woke in a wooden box. The lid to the box fell off, revealing some snot nosed brat standing a few feet away, eyes wide in awe. What caught his interest the most, though, was that the brat had that secret scroll Hashirama had been working on before Madara had left. As he stepped from the box, he spotted two other boxes, and almost immediately recognized the two. 'Well. This should get interesting.'
Senju Hashirama, the First Hokage, was happy. Why? Well, he honestly had no idea why he was so happy. He just was. He had been enjoying a nice lunch with his wife and children and grandchildren. And then suddenly, he awoke in a box. Well, actually, he realized he was in a coffin. The coffin lid fell off, showing a blond-haired preteen. He sensed a familiar chakra to his left, and he looked over as he stepped from the coffin. His eyes settled on his childhood friend and rival, and Hashirama grinned. 'Sweet! Looks like Mada-chan is here too!'
Senju Tobirama was confused. He had been laying in a peaceful, blank state, enjoying the freedom of not needing to fight. And then, his eyes opened. He saw colours for the first time in years, although it was still pretty dark in the... box? Why was he in a box? He frowned. 'Who stuck me in a box and revive... oh no.' His frown deepened as the lid to the box crashed to the ground. He was about to give his summoner a piece of his mind, only to see a blond preteen before him, the Forbidden Scroll of Seals open before him. Some movement in the corner of his eye alerted him to his brother and his brother's rival stepping from their own boxes. He raised a hand to his head, prepared to fight the already oncoming headache. 'This is going to get bad, real fast.'