I dont know, because Orochimaru seems like hes sorta scared of sasuke right now, and knowing the real truth about itachi now has changed him. That Itachi will still die to protect konoha, and yea i think sasuke will help because a while ago Naruto visited the frog man and when he was telling naruto what sasuke was gonna do naruto cut him off and said "yea i know we are both gonna die" and the Old frog made a face and said "are you sure?" that part made me think sasuke is gonna help and why would he go see all the past hokages if hes just gonna go attack naruto, and hes at the village now so why didn't he attack it? hes been wanting to do it forever