put it this way.... at the konoha graduations 20th reunion, naruto, sasuke, and ino are all hanging out, and shino is drunk off his ass. He gets pissed, because Sasuke is ANBU, and shino got stuck training some punk genins. He turns on sasuke, and says "I hope your proud mother fucker. 4 ninja had to die to bring your bitch ass back. (kiba and akamaru are so fucking owned) I hope your happy. BITCH!" Then sasuke gets pissy and shoots a fire ball at the insectile mother fucker and he overdid it because he's drunk too and has some 151 on his breath, so charred Aburame is on the house (high in protien, and useful in a survival situation) and sasuke is forced to flee konoha again

basically, what I'm trying to say is if sasuke does comeback, people are gonna be pissed and he'll hafta leave again. Which isn't a bad thing, because after his display at the chuunin exam, he could make a fucking killing being the personal bodyguard for one of the diplomats.