The myth Kishi might be going by and Kyuubi might train Naruto. He will probably help him with Bijuudama. In the myths after someone showed him kindness. Powerup probably before fighting Sasuke maybe? Myth also says Karuama is the King of tengu. Reference to Kyuubi being superior.
! Conclusions/Summary (Finally): Parallels & Possibilities
! So how does that relate to the manga? The parallels between Hashirama and Go-Shirakawa in his early years, as well as Madara and Sutoku are over 9000. Hashirama was the one granted with the most ability to control multiple bijuu, just as Go-Shirakawa was first granted with the knowledge of what a daitengu was. Madara ended up disgraced and exiled despite trying to rebel, just like Sutoku, even sharing a tengu incarnation in Tobi. Sutoku and Go-Shirakawa being brothers reflects how the Senju and Uchiha clans descended from the Rikudou's sons.
! Similarly, ties between the Taira clan and Uchiha are great — they were even with their rivals before being demolished by them. The Minamoto clan also draws ties with the Senju and Uzumaki clans in the manga: their rivalry with another clan, the way the Uzumaki were scattered, how the Senju recovered from Madara's attacks and maintained Konoha. The Minamoto clan's attempt to oust Go-Shirakawa from power even reflects how some factions within Konoha, like Danzou, rebel against the will of fire.
! I didn't go into the Shinto gods in detail because they're not directly related to this, but there are plenty of posts that go over how the Uchiha clan has a lot of jutsu names relating to deities. I'm going to note Susanoo here, because tengu are considered descendants of his. Sasuke's ability, granted by Itachi, to use Susanoo as a technique might possibly be linking it to the demonic chakra we see in the bijuu. Susanoo, as an Uchiha technique, makes the fight between Sasuke and Naruto (as the kyuubi jinchuuriki) even more fateful than just their clans would have it.
! In the same way perceptions of tengu went from evil to more sympathetic, the bijuu have lately been given more personality and background, with justifiable reasons for their hatred: our protagonist, Naruto, is starting to understand them. They're integral to the "shinobi family" without ever even being acknowledged. The role of acknowledgment makes Yoshitsune of the Minamoto an obvious root for Naruto. Both their fathers are killed because of a sneak attack by an enemy clan (Madara and Taira no Kiyomori). Both babies are abandoned, Yoshitsune at a tengu temple and Naruto with a demon in him, check. Both begin learning only once they learn kindness — Yoshitsune by giving it and Naruto, initially, by receiving it from Iruka. I wouldn't be surprised if, due to Naruto recently showing kindness to Kyuubi ala Yoshitsune, Kyuubi ends up taking the role of pseudo-teacher like his tengu counterpart.
! And as far as Kurama goes, obviously, Kyuubi very likely draws his roots from Sōjōbō of Kurama, from where he gets his name. As Sōjōbō is the king of tengu, and Kyuubi has the most tails, I'm guessing it's more confirmation that even if Hachibi's right that tails don't equal power, the depth of Kyuubi's spiritual dissonance/level of hatred and the depth of his "knowledge" is the greatest amongst the bijuu.
! So, tl;dr: sorry for the tl;dr I don't really have any points to make but figured I'd share the possible mythic/historical context behind the name reveal, expanding on my comments here & here. Either way, I'm really looking forward to how Naruto and Kurama's friendship develops (the Talk no Jutsu we've all been waiting for!!1!).
Here they talk about Tobi and how he starts wars. Tobi is symbolism is a kite BTW
! The Uchiha are said to descend from the elder son of the Rikudou Sage. As is known, the elder brother was passed over so that the younger and more trustworthy brother may become heir. Again in the 12th century, the Emperor Sutoku was ordered by his father to hand the throne over to his younger brother, Konoe. Even when Konoe died, the throne was handed to a second younger brother, Shirikawa instead of Sutoku. This was the origin of the Hogen War (1156). Sutoku declared that he shall “…become the great demon of Japan. I shall throw the world into confusion and haunt the nation.” (de Visser, Tengu 48-50) It was said that he began to take on the resemblance of a Tengu in life, no longer cutting his nails or hair. After his death eight years later, he was believed to have returned as a Tengu (with the eyes of a kite) and was said to be the origin of most other wars of that era.
Madara and Tobi
! Madara, as the greatest Uchiha ever to live (at least up until this point) and the man whose very name can start a war, is the one with perhaps the strongest relations to the Tengu myth. Perhaps this has to do with his sheer malevolence, as it seems that the darker an Uchiha becomes, the more closely related to the Tengu he becomes (Kuromaku). Tengu have come to be associated with exile and vengeance over the years (de Visser, Tengu 42), both things that Madara himself is closely tied to. Those forced into exile who chose to take the Tengu-road for vengeance could be reborn as the creature in order to wreck havoc. Madara, though he willingly went into exile, later returned in an act of revenge. Sasuke has gone down a similar route, though as a character with a chance for redemption, his imagery is not nearly so powerful as Madara’s.
! There are two kinds of Tengu, and those that are able to take on fully human form are often called Daitengu or Konoha-Tengu (Knutsen 10); Madara himself is the founder of Konoha. Semantics aside, Madara seems to have a knack for kidnapping youths and corrupting them. Itachi, Nagato, Kisame, and possibly Sasuke were all victims in this manner (please note that Madara clearly was involved in Nagato’s upbringing and it’s very likely that the original/real Madara was also involved in Kisame’s corruption and Itachi’s massacre). Over the centuries, there were dozens of stories of children and teenagers being kidnapped by Tengu; when they returned, if they did at all, they were usually either utterly mad or masters in swordsmanship. He also not only wears the crest of the fan, but actually wields one as a weapon, as many Tengu did.
! I’ve noticed that the way in which Madara is viewed by the rest of the cast is unique in the series. He is clearly intended to be something entirely other. Strangely enough, when Tobi announced that he was indeed Madara, who had never died, and decided to start a war, nobody particularly questioned his identity. The thought that Madara could either escape an unavoidable death and/or rise from the dead was taken in stride by those at the Kage summit. Tsunade later admitted that there is so much power in the very name “Madara” that one could easily start a war simply by claiming to him, as the name brought that much fear. He is accepted as the carrier of an ancient curse, more or less condemned to commit war and bring hatred and violence. This is very much in line with those who become cursed by walking the Tengu Road after death.
! I had difficulty deciding if this next part belonged with Madara or Tobi, seeing as it really seems to belong in both, but I finally decided on placing it here with Madara, seeing as what Shikaku said of Tobi was based on the idea that he was indeed Madara (and therefore he was possibly referring to the original Madara). While it is Tobi who is called Darkness, it is Madara whose name is enough to start an entire war, Madara who, as Shikaku believes, uses hatred as a weapon. His name is darkness in that it is fear. Tengu came to be viewed as the “condensed spirit of the darkness, the element yin, opposite to yang, the light of the mountains” (de Visser, Tengu 76).
! Another peculiar fact is that it is believed that one of the origins of the Tengu is the Chinese Celestial Dog, which was in reality a meteor. There were also many recorded instances in the 18th and 19th centuries of Tengu throwing immense stones onto people for no real reason. Madara throws meteors at people. Certain early Chinese myths even spoke of these Celestial Dogs devouring the moon, which is comical considering the Moon’s Eye Plan.