Something I have noticed while reading since Sasuke has re-emerged:
I've noticed (along with many of you) Sasuke's lack of interest/zeal, but he has spent time pondering Fourth's moves and chakra with great interest, provoking internal dialog and thoughts. I just have the sinking feeling he is going to try and hijack Kurama's other half before Naruto can claim it.
Plot wise it would be the upgrade Sasuke fans say he needs (I'm not arguing just pointing out), and it would give reason for Naruto and Sasuke continue their rivalry, also give Sasuke a point in being in the war besides just surviving and mixing his chakra to Naruto's attacks.
What do you think? Plausible? Possible?