I dno't think Sasuke will go for Naruto, even he know's that naruto would put up to much of a fight, and the possibility of Naruto defeating him is a possibility. So I think It's Sakura that Sasuke will go after and try to kill. Let's be honest here, she is not the strogest of the bunch and he also implied that she was a precious freind as well. Also I think this would up the the level of tension between Sasuke and Naruto to an epic level. This would fuel and entire arc or atleast one of the best fights we will ever see in this series. It's all specualtion, so I could be wrong.