If you read the chapter you're mentionining then you'll see Naruto didn't know IT had been cast, Sasuke was up there in the sky when Madara cast IT and knew right away. So Sasuke stopped Naruto even before Naruto could counter it himself. So my reasoning from the previous post still holds true. You see, Sasuke too was staying inside the susanoo so Naruto also stayed as a precautionary measure and did not try to counter IT to make a point to Sasuke fans that he's immune to IT as well.
Wow and I already got negged for having a genuine discussion lol. The butthurt...
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