Awesome chapter, even better than the pein arc (best arc yet), Sasuke's laugh is a prime example that he will be the final antagonist.............:sasuke:
Here is my long term prediction (in chapters):
484-485: :sasuke: vs. :kakashi:, Mangekyou's come out. Naruto arrives.
486-487: Naruto tries to reason with Sasuke, but sasuke fights him as he disagrees with naruto and is pissed off that he still thinks they are buddies.
487-490: Avant Grande battle with sage mode vs. Mangekyou, :kakashi: is out of chakras. Naruto goes four tails...but controls it due to sage mode, it appears sasuke goes blind, naruto pities him... and it turns out sasuke is just using genjutsu, naruto is prepared (explains he realised it wasnt real)... and sasuke uses susanoo.
490: sasuke is beaten, when naruto uses a four tails sage mode rasenshuriken, he throws four of them, after breaking susanoo with an Odama rasengan..... sasuke tries to use amaterasu, but goes blind in one eye, he is hit by narutos storm of Kyuubi FRS, they have explosive qualties.
491: Naruto is upset, but he realises sasuke is alive, he used Izanagi (he learnt from Danzo). now he is blind. Sasuke is about to be killed by :kakashi:. Naruto asks why, as he is blind and helpless. Kakashi says if madara implants him with another set of mangekyou's, he will become unstoppable and seek revenge.
492: Madara intercepts, he beats all of them down, naruto exits Four Tails seinin mode and is told of madara's plan. Madara says he will be back in war time. He kills karin as she knows too much and leaves.
493-500: they return, tsunade dies, kakashi is made 6th hokage, tsunades funeral, Naruto makes a speech. later he has flash back of sasuke with sakura, who realises they have to save him and make peace......
Naruto has a dream where itachi says he beleives in him.,... itachi gives naruto a message (not seen by readers).
500-508: It is seen that new members have surfaced in akatsuk (Sasuke, Zetsu, Madara, and five new members) . The gedo mazo now has sharingans in its active eye holes as sasuke is possing it . Sasuke is the leader and he has EMS implanted from itachi.... (see pic) madara is seen in foreground announces they must find certain scrolls from each nation, that have seal which when together will bring the juubi to earth and put the bijuu into it. The gokage invented these incase they ever needed to seal away the bijuu forever. Sasuke announces they will restore the uchihas pride, create a new world with the juubi and he will destroy konoha (in his mind he intends to kill madara)....... We see that one member has cought killer bee............... The raikage arrives at konoha, tells kakashi this, and explains killer bee's last wish was for the raikage train the jinchurriki that he spoke of, from the summit.... naruto............. so naruto leaves for 6 months, sakura and other members are seen training. in a mountain somewhere Suiguetsu, Jugo, and a complete Orochimaru stand smiling, vowing to kill Uchiha Sasuke.
End of part 2
There is a gaiden for madara's past. (excluding his battle with 4th hokage, as that will be in part 3 as flash back, danzos past will also be expanded in part 3, same with kisames death and killer bees capturing)
Enjoy.... feed back please. Hope it makes sense XD
Peace Out
Below is what I think sasukes EMS will look like...........