Well, let's see...
His daughter is the main character of the manga, the main villain is an Uchiha and the main storylines of the manga involve him more than any other character. So I'd say his role is to be the main character of the series again, while Naruto is his sidekick.
Oh and based on what we know so far Sasuke hasn't returned to the village once since he left of his own volition, on his OWN mission to redeem himself and prevent a revival of Kaguya. He is still on that mission as far as I'm concerned. I don't see him wearing any Konoha headband, I haven't seen anything to suggest he's a resident of Konoha, so I have no reason to believe he's acting under anybody else's orders other than his own. The guy merely told Naruto what was going down because Naruto has political influence and is capable of getting the message across to other villages. Sasuke's goal, as Kishimoto has said in interviews already, is to prevent a repeat of the past. If anything, Sasuke is bossing Naruto around still. He sends his Falcon and Naruto drops everything (including his own son's graduation) and comes running to him.
His daughter is the main character of the manga, the main villain is an Uchiha and the main storylines of the manga involve him more than any other character. So I'd say his role is to be the main character of the series again, while Naruto is his sidekick.
Oh and based on what we know so far Sasuke hasn't returned to the village once since he left of his own volition, on his OWN mission to redeem himself and prevent a revival of Kaguya. He is still on that mission as far as I'm concerned. I don't see him wearing any Konoha headband, I haven't seen anything to suggest he's a resident of Konoha, so I have no reason to believe he's acting under anybody else's orders other than his own. The guy merely told Naruto what was going down because Naruto has political influence and is capable of getting the message across to other villages. Sasuke's goal, as Kishimoto has said in interviews already, is to prevent a repeat of the past. If anything, Sasuke is bossing Naruto around still. He sends his Falcon and Naruto drops everything (including his own son's graduation) and comes running to him.