Alright, so this is a theory based on Naruto's marks when He is in BM using the nine tails chakra, relating to the rikodou sennin. Basically the connection between naruto and Sennin's similar looks.
This is also an add to Sir Derp Obito's thread about naruto meeting Rikodou.
Well, we all know Naruto looks pretty similar to rikodou sennin when he transforms into BM mode, right? Probably looking similar with the hair, and the marks on the body, like for the biggest give away, the Tomoe on his neck or chest.
So, you guys never wondered why they look pretty similar? Well my very harsh guess I and a friend caught out together was that; rikodou sealed some of his own chakra into Kurama, the nine tailed fox... Hoping someday... some one, a person would be coming and using the nine tails, Kurama (person; which is naruto right now) and be able to use the true power of Kurama.
....to use Kurama's true power, and become united. Which is happening right now.
From their, my believes is that some of rikodou's chakra is being used by naruto while kurama is handling chakra to naruto. which then occurs to make naruto gain Rikudou's chakra ASWELL as Kurama's chakra, then which occurs to make naruto get the similar look/reflection of Rikudou's sennin.
So from their, I'm also going with Derps theory and I believe in it.
So guys, what do you think? What do you think about my first theory?