Naruto’s always been a sensitive guy, so I guess there’s no need to bring ratios into the picture when he can just feel when the new Rasengan is right. Still, that training portion of this chapter did make me think about some potentially funny moments if math is a requirement to become a Hokage. The rest of the chapter was a lot more interesting in the sense that it almost felt like Kishimoto wanted to put all the suspicion and theories out there about who was in the final coffin to rest.
In Kabuto’s explanation to Madara on how the Edo Tensei technique works, he pretty much ruled out some of the big name candidates out there, such as Minato, Jiraiya, and Shisui. In addition, the DNA requirement was officially added to it, meaning that Orochimaru did have to do some grave digging in certain cases even though he doesn’t need the actual corpse of the person he wishes to summon. On top of that, there’s the limitation on how the ability’s unable to summon those whose souls have been trapped elsewhere, e.g. by the Shiki Fuujin (Dead Demon Seal). The last one was always a fairly popular assumption, though I do find it interesting how Kabuto attributed Orochimaru’s failed summoning during the Chuunin exam to that, rather than Hiiruzen’s intervention like it appeared to be. He did have a coffin prepared ahead of time, so it seems a bit odd for it to have failed during the summoning of the coffin and not during the binding of the soul to the human sacrifice. I don’t know whether or not that was a minor amendment to maintain consistency on how the technique works, but I haven’t completely ruled out the possibility given how I discussed something similar last time about what came first, the Rasengan or the Jinchuuriki Imari.
Assuming that the foundation has been set for this ability going forward, the speculation will probably continue within the confines of it. Madara’s brother still remains a possibility, albeit an unlikely one since we don’t know too much about his abilities (outside of Sharingan ones) and can’t really assess if he’d single-handedly turn the tides of the war. As such, Rikudou Sennin appears to be a much more probable one, since his name alone is enough to reaffirm that he would. Whoever’s in that last coffin, it’s probably safe to assume they’ll have a huge impact on the overall story, simply because their identity’s been kept a secret all this time. When I first read that chapter, I thought it was going to simply be a cliffhanger that would be revealed the very next one, except now it’s gotten to the point that it would be a huge disappointment if there isn’t someone “big” in there. That’s especially true considering that they’d be technically immortal with the forbidden technique, which just so happens to come at absolutely no risk to Kabuto. Talk about being overpowered.
In the meantime, there’s so much to get through before that subplot looks like it’ll be revisited, plus there are still plenty of other revived ninjas who should prove to be a handful already, such as Itachi and Pain. It’s news to my ears they still have their eye techniques intact, since their were eyes blacked out when they stepped out of the coffins, making me think they wouldn’t. (This was before the whole DNA bit came into the picture.) Before even getting to those two, Zabuza and Haku look like they’re up next, with Kakashi and Guy rounding things out on the ninja alliance side. I’m always up for seeing more of those two guys in action, particularly Kakashi since Guy’s already strutted his stuff recently in a tilt against Kisame. Other than that, I do feel it was a bit of a waste to see Torune and Fuu sacrificed so whimsically to demonstrate the technique to Madara. They are Konoha ninjas after all, and seemed to be respectable ones as well if we overlook how they served Danzou.