anyone notice in the fight with orochimaru before the 3rd died he remembers when his teachers told him he was going to become hokage. the 1st and 2nd were standing in front of him. and he was just a boy at the time. but in danzo's flash back when he was about to die, he remembers that sarutobi was told he would be hokage during a war, in which only the 2nd was there and sarutobi was about mid or early 20's. and i havent seen when the 4th was made hokage, maybe thats in the manga or something. i had always assumed that because he died sealing the 9 tails away, that he was awarded the title hokage. like when a soldier dies and moves up a few ranks. (btw who else thought it was cool that in danzo's flash back we get to see the konoha elders when they were young)