Did Aokiji predict the future to avoid the Whitebeard’s blow? Or did he just realize that the attack was coming and shaped his body quickly?
Since the Admirals already have Flowing Haki(Advanced Armament Haki), because we saw them block Whitebeard’s Quake, it wouldn’t be surprising if they have Future Sight too.
Especially since they’re not natural-born monsters like certain Yonkos, who can rely on their brute strength.
Imagine all the life-or-death battles the Admirals have gone through to get here. Their Haki must be insane compared to normal New World fighters. And yet it’s like a pre-requisite to compete with those Yonkos, who don’t need Technique when they have Power.