This is Itachi before he dies but fully rested. Marco thinks he knows where Ace is and Itachi in turn thinks Marco is a threat to Konoha. The fight takes place on the Naruto Bridge and they start 10 meters apart. Both are in character.
"To all visitors from Transylvania looking for the head of Voivode Dracula: Yes, we have it. Yes, he's dead. No, you cannot see it. No, he will not return and invade you again. It has been over thirty years, please stop pestering us."
I don't think so. Itachi reacted to near light speed attacks/movements though. He always has Genjutsu right off the bat too, and can end it with a quick Amaterasu while he's distracted with Genjutsu, which he would probably do if he thought Marco was a threat to Konoha.
Again, Itachi ftw.
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"Why is everybody so ****ing stupid?"- Kim Jong Il, Team America.
Well Hiraishin teleports its user at light speed and Killer Bee while teamed with Raikage was able to tag Minato. Naruto's faster than Raikage, and Nagato soloed Killer Bee and Naruto at the same time with ease. Itachi then saved Killer Bee and Naruto and easily defeated Nagato with a stab before Nagato could even react. That instantly puts Itachi at near Hiraishin reaction speed, which is about light speed reaction. Still a bit slower, but it's still near LS reaction speed.
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"Why is everybody so ****ing stupid?"- Kim Jong Il, Team America.
He can turn into light and move while being the embodiment of light? He can shoot light as well. He even asked someone, who's name I forgot, if they ever have been kicked at the speed of light IIRC.