Picture the producer talking to the studio heads:
"Think machine guns and angels! ... We've got [insert good actor/actress] already signed up. Its just like that Christopher Walken movie The Prophecy, except this time both God and all the angels are all pissed."
There's a flicker at the beginning of Army-of-Darkness-style Sam Raimi genius, but it quickly fades into a story that takes itself too seriously. There's no flow in the actors or dialog from scene to scene, so its impossible to care about the characters, even when their copious talents are put into some outstanding monologues.
This movie should have embraced how absurd it was and pushed it over the top at every opportunity with the zeal of a teenager on too much caffeine. Maybe next time, captain angelface.