The problem with the "Fourth Father" theory is that if Naruto were in fact the fourth's son, why the hell is the villiage pissing on him. If anything, he would receive props, much like the children of any other hokage. So that begs the question, who in fact was Naruto's parents? i am guessing they were no name ninjas. This would allow the villiage to piss on Naruto b/c they do not hold his parents in high regard unlike sasuke who parents totally owned... anywho this would totally tie into Naruto's theme of hardwork outdoing talent, or more precisely, a small amount of talent tempered with hardwork, will make anyone a badass. If you doubt that statement look to Rock Lee, Naruto training sessions, etc.

peace

injun