IF sasuke...

[Narutrol]

I don't think he was confident enough before getting use to his Rinnegan before trying it.

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Edit: Obviously this was before he showed PS with Naruto so Idk how his mindset was after that

Ems was called true power by itachi. After gaining ems, sasuke thought he above even 5 kages. After the scan, he fully acknowledged him as equal

This scan also imply ems sasuke would have a hard time surpressing kurama inside his body

 

[Raykyryn]

With having Naruto,Kakashi and Gai around, he gets godstomped lol.

 

[Narutrol]

With having Naruto,Kakashi and Gai around, he gets godstomped lol.

But guy committed suicide and kakashi lost his eye...

 

[Raykyryn]

But guy committed suicide and kakashi lost his eye...

If thats the case then his odds are better. But he would still get overwhelmed in the end.

 

[Chaosmark101]

Obviously. Sasuke planned on doing it after speaking to the Kages.

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EMS Sasuke showed he wanted to get rid of the Bijuus,Naruto,and erase the past - all things he outright said later while having the Rinnegan.

Yeah but where did that confidence go post BSM unveiling?

Refer back to my scan, from chap 645. Those images you posted were before he (Sasuke) knew of BM & BSM.

Ems was called true power by itachi. After gaining ems, sasuke thought he above even 5 kages. After the scan, he fully acknowledged him as equal

This scan also imply ems sasuke would have a hard time surpressing kurama inside his body

Nah, Sasuke only acknowledged him right

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EMS is very powerful, but it isn't absolute as it was beaten before. And there are powers far greater than EMS.