My theory of Sasuke obtaining the mangekyo sharingan is different to how Itachi obtained his. You may wonder this is all nonsence and bullshit and this is how i think of it. In chapter 234 page 16, Sasuke states he will not follow the same path as Itachi and obtain power in his own way and u may think he's referring to curse seal. Sasuke is probably taking advantage of Orochimaru to learn more jutsus. I think Sasuke will awaken the Mangekyo Sharingan while saving/protecting Naruto while a member of Akatsuki is trying to kidnap him or something. As we know Kishi have something with protecting friends and how true power is unleashed as one is protecting something/someone they love. Lee's rule to use Ura Renge is that... Gaara realised that power comes from protecting love ones... Haku also states that aswell.. So i would believe Sasuke's true power which is the Mangekyo Sharingan to be awaken while protecting naruto. Imagine Naruto just about to be knocked out Itachi or another Akatsuki member.. and Sasuke's like damn it... damn it.. if only i had the power... <dramatic pause> *shwing* Mangekyo Sharingan *shwing* and uses Amatersu to stop the attack. Naruto's like... Sasuke... you.... and Sasuke's like... i see... true power comes from protecting your closest friend... There's always some will say no no no Kishi wrote that Mangekyo Sharingan can only be awaken by killing your closest friend... you are right but Kishi hasnt finished Naruto and who knows what suprises await us.. I don't think Sasuke will kill Naruto, if he wanted to.. he would have done it already.. and if Naruto dies.. then the series will be over. Maybe Sasuke will never get the Mangekyo Sharingan and this theory sucks arse. This theory may be one of those happy endings we see so often, but this is just my 2 cents. This theory may be one of those happy endings we see so often.