O.K this is how I think the story will progress. Sai, Naruto and Sakura are gonna find Sasuke and Oro and Kabuto and some new dude. Naruto is going to go after Sasuke, but he will be defeated easily. The dude will fight Sakura and dude will kick her ass. Yamato will be stopped by Oro and Kabuto. And so, Sai will get his development by showing what he is capable of, not all out though, and Sasuke will show some of his progress. This is a topic where you could share how you think the plot will develop.