found these spoilers on another forum
Chapter 640 - Am I my Brothers keeper
Sasuke - my chakra what's going on
Naruto - this technique is....
*Naruto flashes back to the pain fight where preta path was sucking souls*
Naruto - Sasuke this technique will suck your souL out be careful
Sasuke *starts forming perfect susano*
Obito - It's to late you will become part of me, part of PERFECTION
Naruto - Kurama let's switch for a while
Kurama - b*stard at a time like this
Naruto - I need to gather my chakra for "that" attack
*scene changes to Madara and the 1st*
1st - Madara kun i can't play with you right now i have something important to do
Madara - fool you think i care about those brats let's finish what we started 100 years ago
Madara - I will teach you just how futile your efforts was back then
*Madara forms his large susanoo with 2 swords and 4 heads*
*The 1st goes into sage mode and creates a forest*
Both - LETS FINISH THIS
*sCENE changes to Oro and 5 Kages*
All Kages - SASUKE!!!!!
Tsunade - Why has he decided to help us?
Oro - Sasuke right now is facing an internal struggle, him meeting with Itachi the last time has changed his heart
Onoki - These uchiha brats have always been troublesome
Raikage - After this war i'll settle my affairs with this brat
Mei - Raikage we have no time for your squibble we must get intel about the enemy from Orochimaru
Gaara - Orochimaru Sama please inform us about the enemy
*Scene changes to Kakashi*
*Kakashi is trying to heal himself of the gaping wound on his left shoulder*
Kakashi - it's not use i'll certainly die here, what can i do to help with the situation
*Kakashi is able to use his eye to see the situation with Naruto and Sasuke*
Kakashi - I made a promise to them that i would never let them down, i must use "that jutsu"
Kakshi - I guess i'll be seeing you again soon father
*Kakashi begins making dog, lion, and tiger seals, and his body starts to melt away*
Kakshi - GWAAAA just a little bit longer
*Scene switches back to Naruto Sasuke and Obito*
4th - shyt my technique isn't working
Obito - sensai sama my body remembers techniques and the same move won't work twice
Naruto - it's no use his version of this technique is much stronger than PAIN'S
Sasuke - my body, no this can't be the end.....
Obito - just a few more seconds until you're apart of perfection
*a quick burst of lightning cut's of obito's arms*
Naruto Sasuke obito & the 4th - !!!!!!!!!!!
*Obito arms begin to reform*
Mysterious figure "So it seems the 10 jails jyubbi is immortal, well i'm not so bad myself"
Sasuke, Naruto - that voice it's............
Sasuke, Naruto - NISAN!!!!!, Itachi
4th - Itachi!!!!?!
Obito - Hmphhh, you're a stingy b*stard refusing to stay dead
Sasuke - Nisan how are you here
Itachi - when i fought Kakashi in konoha i planted my DNA on him and only with him dying could he activate the seals to restore me in my prime.
Sasuke - !
Naruto - Kakashi sensai
Itachi - Obito let's take this elsewhere
*before obito could respond Itachi warps to him and takes him into the dimension where he fought kakashi*
Itachi vs Obito - the final showdown, who will win the ninja war
Next chapter will be a color chapter
Chapter 640 - Am I my Brothers keeper
Sasuke - my chakra what's going on
Naruto - this technique is....
*Naruto flashes back to the pain fight where preta path was sucking souls*
Naruto - Sasuke this technique will suck your souL out be careful
Sasuke *starts forming perfect susano*
Obito - It's to late you will become part of me, part of PERFECTION
Naruto - Kurama let's switch for a while
Kurama - b*stard at a time like this
Naruto - I need to gather my chakra for "that" attack
*scene changes to Madara and the 1st*
1st - Madara kun i can't play with you right now i have something important to do
Madara - fool you think i care about those brats let's finish what we started 100 years ago
Madara - I will teach you just how futile your efforts was back then
*Madara forms his large susanoo with 2 swords and 4 heads*
*The 1st goes into sage mode and creates a forest*
Both - LETS FINISH THIS
*sCENE changes to Oro and 5 Kages*
All Kages - SASUKE!!!!!
Tsunade - Why has he decided to help us?
Oro - Sasuke right now is facing an internal struggle, him meeting with Itachi the last time has changed his heart
Onoki - These uchiha brats have always been troublesome
Raikage - After this war i'll settle my affairs with this brat
Mei - Raikage we have no time for your squibble we must get intel about the enemy from Orochimaru
Gaara - Orochimaru Sama please inform us about the enemy
*Scene changes to Kakashi*
*Kakashi is trying to heal himself of the gaping wound on his left shoulder*
Kakashi - it's not use i'll certainly die here, what can i do to help with the situation
*Kakashi is able to use his eye to see the situation with Naruto and Sasuke*
Kakashi - I made a promise to them that i would never let them down, i must use "that jutsu"
Kakshi - I guess i'll be seeing you again soon father
*Kakashi begins making dog, lion, and tiger seals, and his body starts to melt away*
Kakshi - GWAAAA just a little bit longer
*Scene switches back to Naruto Sasuke and Obito*
4th - shyt my technique isn't working
Obito - sensai sama my body remembers techniques and the same move won't work twice
Naruto - it's no use his version of this technique is much stronger than PAIN'S
Sasuke - my body, no this can't be the end.....
Obito - just a few more seconds until you're apart of perfection
*a quick burst of lightning cut's of obito's arms*
Naruto Sasuke obito & the 4th - !!!!!!!!!!!
*Obito arms begin to reform*
Mysterious figure "So it seems the 10 jails jyubbi is immortal, well i'm not so bad myself"
Sasuke, Naruto - that voice it's............
Sasuke, Naruto - NISAN!!!!!, Itachi
4th - Itachi!!!!?!
Obito - Hmphhh, you're a stingy b*stard refusing to stay dead
Sasuke - Nisan how are you here
Itachi - when i fought Kakashi in konoha i planted my DNA on him and only with him dying could he activate the seals to restore me in my prime.
Sasuke - !
Naruto - Kakashi sensai
Itachi - Obito let's take this elsewhere
*before obito could respond Itachi warps to him and takes him into the dimension where he fought kakashi*
Itachi vs Obito - the final showdown, who will win the ninja war
Next chapter will be a color chapter
@ those spoilers...probably more believable then what's going to happen 
@ the reveal of these spoilers, I wouldn't put it past Kishi though. Kakashi can't even fight his own battles. You know it's bad when the supporting antagonist-protagonist, steals the show from everyone including the titular hero.
