Re: The Nature energy Connection...
Good thread KYF. @Kael: not everything has to be said for you to apply a lil common sense to fill in the blanks. Like saying it wws never said the Sage used the Juubi when he was its jinchuriki. Lol onviously he MUST have used it all those years it was stuck inside him but you are one of those people that need everything to be stated. Failed logic.
Juugo's clan is a mystery and one cannot help but think his senjutsu/sennin chakra is linked to the Sage in some way. I think although there were other CS ninja's, Sasuke is possibly the first to have Juugo's actual flesh and a lot of it as well, fused on his body. Not only that, but it was fused to a VITAL part of his body and Sasuke is no doubt the only Uchiha to have gone through that process.
So in theory, it can create something unique in Sasuke, like how Obito and mokuton made him special. I like your theory Kyf, very interesting.
The Sage obviously had other descendants than just Senju and Uchiha. The manga even says(this should meet your approval Kael) that Uchiha and Senju are the DILUTED descendants of his 2 son's, so surely they must be more, albeit not as powerful as Senju and Uchiha.
My profile is fucked up so whenever I thank you, it won't show. Lol