Just a thought that came across my mind when i hear you say that the fourth just might be Naruto's father.
I got this, reasonably wild idea, where I think that Naruto is the 4th hokage himself. Yeah it does sound shocking but if you look at the similarities that the two have, especially the hair it just "might" be the case don't you think? I mean look at the confidence with which Naruto says "I WILL become Hokage"....couldn't it be that this is because deep down inside of him he knows that he WAS in fact the 4th at some point but can't recall it?
How could this be possible? Well, maybe the seal with which the Kyubi was sealed was a seal that didn't kill the ninja but instead reversed the aging process?
And so he goes back to being a baby, with the Kyubi sealed in him, resulting in those whisker like scars that Naruto has on cheeks.

I mean there are so many references that draw parallels to both the 4th hokage and Naruto that you know for a fact that there is some deep connection. Another example is when Gamabunta tells Jiraiya that he does not need to see the scroll with Naruto's blood print on it, for he was the next person after the fourth to have stood on his head.

I mean it need not be true but it does seem plausible doesn't it? Maybe someone could disprove this if I overlooked some details. Moreoever, maybe this might just be the twist that Mr. Kishimoto Masashi would want to pull over us don't you think in the concluding chapters of the Naruto saga?

What do you all think?