Revealing mistake: When there is the quick zoom-in on Pestilence, you can tell they cut between to a different shot, as the skull logo on the barrel behind him goes from being sideways to right behind him.
Revealing mistake: When the man gets whacked by the fence in the very beginning, you can see it comes nowhere near actually hitting him.
Revealing mistake: You can tell the spears Lucifer throws at the crow are already stuck in as they supposedly hit him.
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.