Alright, not sure if this has been done before but if it has, stiff shit because I want to do it now. *grin*
Basically, you just have to come up with the most unexpected theory about a character (such as tobi) that you can think of.
I'm talking about theories you'd never expect to see come true but "realistically" could by some means.
Here's an example so you can see what I mean by unexpected.
Tobi ends up training Sasuke in the ways of Space/time movement which Sasuke trains to the point he can potentially move back and/or forward through time.
"Insert plot reason" forces Sasuke to go back in time to long ago before the village system existed, In this time he decides to go by the name of "Madara" and eventually becomes the rival of Hashirama whom he later founds Konoha with.
Basically this theory is that Tobi is just an elderly Sasuke haha.
Which would be weird/horrible/unexpected.
Neither Jiraiya or Itachi are dead, and both will come back at some point to save Sasuke and Naruto. After saving them, Jiraiya will wake Tsuande up by groping her old boobs and they will do it. Itachi will then kill Sasuke because he will deem Sasuke an idoit, and Itachi will become the strongest character ever because he will gain EMS, and then wil thus become the official 6th Hokage.
All of this is only a Genjutsu and nothing really happened.
How lame would that be !?
And with Naruto's now vast knowledge from the three year long genjutsu he goes Sage Mode and kills Mizuki with a Rashurkien. It would be like when Goku was a kid in DBGT, just not as stupid.
Ok... this is the rant I keep in my sig. I guess it fits here.
medic: its been 3 years, and you were in a coma.
naruto: it was all a dream. what about jiraya, sasuke, sakura, kakashi sinse orochimaru, kyuubi, third hokage, me getting laid with that women while traveling with jiraya, hinata's confession, and akatsuki.
medic: im gonna make it queck. who is jiraya. orochimaru is the hokage. sasuke killed sakura after 3 days of being on the same team, but it was self deffens after she broke into his room half naked wanting to rape him. hinata left the village seeking reveng from neji after he killed her clan. akatsuki is famus band with itachi, and kisame as lead singers.
3 days have passed and naruto saw sasuke.
naruto: sasuke your back in the village buddy. how about we battel each other for re.............
sasuke: ..... what are you looking at.
naruto: why are cleaning the floor.
sasuke: because im the ganetor like every other famus uchiha.
then naruto kills himself.
kakashi having golden teeth under his mask lOL
I believe EMS ultimate power is to summon a comet to earth capable of Reducing all creation to ash.
I think it's possible that Kiba is Kakashi's bastard child.