Shin was introduced, and we took him as a fodder, but he may be hiding a lot of his potential. Right now, as far as we know the new Akatsuki's goal hasn't been elaborated in full, but they want the eradication of Sasuke for killing Itachi and the remaining traces of the Uchiha clan left.
Before ambushing Sasuke, Shin was sent to test Sasuke's strength, and report it back to his "father".
After the encounter, and witnessing Sasuke's strength first hand, Shin was still confident enough to say "Sasuke will die by my hands." or for the sake of translation that Sasuke can be killed by him or his father.
Upon meeting Naruto, Shin didn't waste time unleashing his big guns on him, coming with killing intent this time around.
Naruto could quickly deduct Shin was nothing ordinary and highly trained.
Shin had to retreat by force, with his father (maybe channeling through the mini juubi) that he is no match for Naruto.
Naruto, being alarmed by Shin, told Sarada & ChoCho even with a shadow clone escorting them back to the Village they still wouldn't be safe.
So, Shin's father sent him to test Sasuke alone (which could've turned out deadly for him), but forced him to retreat against Naruto upon facing him one on one? Shin is no kid, most likely a highly adept experiment with a deadly MS. For all intents and purposes he strength level may that of EMS, and he may have susanoo for all we know. His strength caught the attention of Naruto (who we know can sense and read people in and out) not to take lightly.
Before ambushing Sasuke, Shin was sent to test Sasuke's strength, and report it back to his "father".
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After the encounter, and witnessing Sasuke's strength first hand, Shin was still confident enough to say "Sasuke will die by my hands." or for the sake of translation that Sasuke can be killed by him or his father.
You must be registered for see images
Upon meeting Naruto, Shin didn't waste time unleashing his big guns on him, coming with killing intent this time around.
You must be registered for see images
Naruto could quickly deduct Shin was nothing ordinary and highly trained.
You must be registered for see images
Shin had to retreat by force, with his father (maybe channeling through the mini juubi) that he is no match for Naruto.
You must be registered for see images
Naruto, being alarmed by Shin, told Sarada & ChoCho even with a shadow clone escorting them back to the Village they still wouldn't be safe.
You must be registered for see images
So, Shin's father sent him to test Sasuke alone (which could've turned out deadly for him), but forced him to retreat against Naruto upon facing him one on one? Shin is no kid, most likely a highly adept experiment with a deadly MS. For all intents and purposes he strength level may that of EMS, and he may have susanoo for all we know. His strength caught the attention of Naruto (who we know can sense and read people in and out) not to take lightly.