I'm sure that some people have noticed this before, but some of the dead and tortured NPC sprites seen in the final version of Shadow Warrior are based on beta designs for enemies.
Look at these sprites:
All of these are based on the beta, pre-Chuck Jones Coolie sprite seen here:
Both the NPCs and the old Coolie design have the same art style and share a lot of details, such as their shirt color and hat design.
This half-dead NPC:
is based on this design for the enemy ninjas:
Notice that they both have a blue vest, a V shape on their head and wristbands. The sprites aren't exactly the same, but they're so close I think the half-dead NPC is a touched up enemy ninja sprite.
One more thing. Look at this guy:
Not much right? However, if you compare him with the old enemy ninja design...
They both have a V shape on their head. I suspect this was based on the old enemy ninja sprite as well. Perhaps it was an earlier design that was never shown in screenshots?
All of this means that, technically, some of the old enemy designs seen in beta screenshots were never removed from the final game.