Continuity mistake: When War's truck drives out of the mine in the beginning, at first there are protesters a good ten feet away waving signs, but in the closer shot one of the protesters is waving a sign just about a foot or so away from his truck, without having any time to get closer.
Continuity mistake: When the bad guys first go to their hideout, War walks up to Lola. She goes from pulling gloves/bandages off her hands, to suddenly washing her hands between cuts.
Continuity mistake: When Jimmy first applies the black crow makeup, you can quickly see he draws a straight line, then a few shots later, it is a curved line.
Continuity mistake: Almost everyone in the bar disappears, even though it was full moments earlier.
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.