Either SM Jiraya or Pa/Ma will sense Amaterasu build up like Zetsu, Nagato or Jubito already did and counter it easily
He doesn't need to seal Amaterasu actually. He can escape it either with his
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(becoming one with his shadow) or block it with
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then use it as a weapon against Sasuke by firing it back at him with
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. An easier method would also being simply using clones as diversion.
He has far superior stamina to MS Sasuke, so he could outlast him in this case, but it's not really needed when Sasuke lacks counters for
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U_U