All right i think i will get this disscusion back on track,
I came across a pretty neat theory of who tobi is actually Nawaki for those who forgot he is the little brother of the current 5th hokage , I also came across this a while ago this quote is from an interview with the author Kishi
in stead of copy and pasting all the info onto here and pretending to take credit for it i will link you to the thread it is very well organized with pics and text going over all the points
http://forum.onemanga.com/showthread.php?t=125715 <--
have fun i enjoyed reading it
I did find it a bit odd that kabuto only revived dan and not nawaki he revived a lot of people that were not powerful but had a strong emotional connection to throw people off
Nawaki is a senju / uzmaki descendant the 1st married an uzmaki etc So is the 5th