Board Thread:Theories and Speculation/@comment-36512555-20200101053037/@comment-4961229-20200415170308

Jason of the Mangekyou wrote: Both of you are wrong in that he reacted to Sasuke dropping his hand, as he wasn't staring at Sasuke's hand but at kirin. The fact that he put up susanoo after kirin launched makes it a reaction feat. Consider this: The fact that he reacted and dodged AFTER the bullet was fired makes it a reaction feat. The same with Itachi, he knew what was coming, but knowing what was coming doesn't help him in any way to counter what's coming after it was launched and no defense being up. It doesn't matter what he was staring at. As has been demonstrated, if something occurs within the field of vision (which this most certainly did) of the Sharingan, it is recorded and the wielder of the doujutsu is made aware of it. There is absolutely no need for him to be looking directly at it. Direct focus is only necessary when there's multiple objects, moving extremely fast with complex motion, like Kirabi's swordplay. There was nothing like that in this case.
 * Liu Kang is surrounded
 * 
 * 

We have far more information in the pics you provide than we have in Itachi's case. In pic number 2 it clearly shows that dude standing there with the bullets already flying towards him in the air. He only starts his reaction in pic 3. We have no equivalent shot of Itachi standing there doing nothing, like this dude, with Kirin already in motion towards Itachi and then another pic of Itachi initiating Susanoo. These are two completely different situations.