I think something like this will happen as well. After Kaguya is sealed, Naruto might be injured badly and Sasuke attempts to stab Naruto right then. Naruto can't defend himself and Sasuke with a look of mixed glee and anger shouts " Now I'll finally finish you off! "
But just as he is about to stab Naruto, Sakura comes in between, punching and sending Sasuke's weapon flying. Then she gives Sasuke the angriest and scariest look ever saying " You hurt Nauto and I'll kill you!" . Then Sakura unlocks a new power and destroys Sasuke, punching and kicking his ars* all over the battlefield, kinda like how Tsunade beat up Orochimaru. Just when she's about to finish off Sasuke, Naruto stops her. Sasuke gratefully hightails away from there saying " You were lucky this time, next time I'll finish you Naruto".
KISHI, MAKE THIS HAPPEN!!!!
No.
Sasuke will not betray Naruto anymore.
They will clash over different opinions, they will fight out of rivalry, but Sasuke will not betray Naruto like that.