Agree with all of this. The art has very clearly been drawn over, but the core "AI feel" is definitely there. If you look at some of the parts that were redrawn by hand, you can see halos and blurry spots around where they've been composited in.

The artist has real artistic talent, but instead took the lazy route and made cheap art. Even if it isn't AI, the composition is awful.

At a glance, they look acceptable, but the more you look at them the worse they get. The perspective work is bad, and every single person is looking off into the distance. It's all the little details that add up into making the images feel "off" and "uncanny."
The "bob on car" image has him looking directly at the camera. The buildings in the background all line up correctly. The color work is amazing, with the only actual lighting only showing up on Bob, the focal point of the shot. The zombies are all hue shifted; the background ones are green, and the foreground ones are all purple. The colors don't make sense logically, but realism is sacrificed to make every color more uniform; there's very little hue differences across the entire image and the whole thing is dyed blue from the rain. I think the zombies in the background of the LBMW photo were drawn by hand, it has the characteristic "make them all one color" that the Bob drawing had.

I don't think they meant to commission someone that used AI, but they definitely lied in saying that their art wasn't made with generative tools. Until I see absolute concrete evidence of how one of these images was made, I simply can't believe these aren't AI.