The Priest does look promising on it's synopsis and poster, but it fails to even bring any excitement. Although the movie did show off some good scenes and also action, it was luke warm and anti-climax. The plot was also almost typical where the hero a.k.a 'The priest' defies his leaders and goes against the villains, unauthorized.
The movie however is worth a watch if you are intending to see how the world would be if the church became too strong. The movie I believe takes example to the dark ages when the church sold confessions for profit. The only difference is, the movie depicts the future. Not a bad movie to fill time, but I bet there are better choices available.