Looking at the right hand, I think it’s possible. The guy appears to be gripping the sword in two hands, but the thumb and index finger on the right hand are both clearly visible meaning he’s not actually gripping with it. The crossguard kind of overlaps the hand as well, and the hilt isn’t visible at all. If that particular part was sketched by Rob liefeld I would say it was human made, but right now I’m leaning towards Ai.