it would be kinda weird without sasuke, I mean that is like the main story "finding Sasuke", That been Naruto's goal for like years now, so it would be drastically different without him.

and besides there needs to be a cooler character, I mean naruto looks like an idiot and acts like an idiot (although thats the point), and rarely is awesome beyond reason, sasuke usually fills in those gaps when he's not being uber-emo