This is just to quell the people who still believe that whether or not Madara got backstabbed, he would have still lost.
Let's say for some magical reason Naruto and Sasuke fuse after Madara cast IT. He comes back down to see one person with Sasuke's Rin'negan and Naruto's Rikudou Mode cloak.
Scenario one: They have all feats from the Kaguya fight, but in one body.
Scenario two: All feats up until the end of the VOTE2 fight but Bijuu chakra isn't needed to use the Bijuu Susano'o because of Naruto's Yang enhancement and his own Bijuu chakra. And for all intents and purposes, this fusion has a mastered Rin'negan and mastered Bijuu KKG (so it can use all the Bijuu's KKG on a whim) and it can use Limbo.
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Let's say for some magical reason Naruto and Sasuke fuse after Madara cast IT. He comes back down to see one person with Sasuke's Rin'negan and Naruto's Rikudou Mode cloak.
Scenario one: They have all feats from the Kaguya fight, but in one body.
Scenario two: All feats up until the end of the VOTE2 fight but Bijuu chakra isn't needed to use the Bijuu Susano'o because of Naruto's Yang enhancement and his own Bijuu chakra. And for all intents and purposes, this fusion has a mastered Rin'negan and mastered Bijuu KKG (so it can use all the Bijuu's KKG on a whim) and it can use Limbo.
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thread if you're wondering why this person has Limbo.