When Sasuke see Tobi's sharingan, it automatically trigger amaterasu.
We know that it's Obito's eye just like Kakashi, so Sasuke's amaterasu should trigger on Kakashi's sharingan too.
In their last "fight" Sasuke's amaterasu didn't trigger when he saw Kakashi's sharingan, or maybe Itachi gave this power to Sasuke and it works only 1 time?
All this to say that Itachi's plan was dangerous for Kakashi .
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We know that it's Obito's eye just like Kakashi, so Sasuke's amaterasu should trigger on Kakashi's sharingan too.
In their last "fight" Sasuke's amaterasu didn't trigger when he saw Kakashi's sharingan, or maybe Itachi gave this power to Sasuke and it works only 1 time?
All this to say that Itachi's plan was dangerous for Kakashi .