Visible crew/equipment: You can blatantly see lights in the water when Jimmy is brought back to life, which makes no sense at a garbage dump at a closed mine in the nighttime.
Visible crew/equipment: When War is blasting the fence in the beginning, you can see wires for the squibs running along the metal fence.
Visible crew/equipment: When Luc shows El Niño his "666" marks and Niño says: "Well, all right", you can see a camera shadow move across El Niño.
Answer: As I understand it, it all had to do with a spat between the director of the original Crow movie (Alex Proyas, who had "approval" of all the subsequent Crow movies) the producer of the Crow movie franchise, Jeff Most, and Miramax. Miramax eventually caved in favor of the producer and it was made into a "non-Crow entity" when Miramax reportedly signed Eminem to play the bad guy.