if you were paying attention you would have realized i had already done that,
1. Orochimaru almost immediately grabbed Sasuke's hand to stop him he wasn't given enough time to start the chidori
2. Sasuke was probably just trying to control his chakra like so...
3. this is Sasuke's moment he wants to make sure Itachi dies by Kirin's Hands he doesn't want to take risks especially since Itachi Uchiha is who he is this is a technique he made to kill him so he wants to make it as powerful as possible.
4. Sasuke's been maturing his skills in MS & EMS it's clear they wanted to change his fighting style up a bit while i prefer Hebi Sasuke to any Sasuke its the route Kishi wanted to go Sharingan is something Sasuke wants to perfect it's his Clan it's His Bloodline Gift so he wants to perfect Susano, etc. i mean look at how well he used Blaze Release he went to study and perfect his MS & EMS abilities
5. are you really not even aware Orochimaru referred to it indirectly in this scan
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