CharlesYang’s review published on Letterboxd:
A pretty good film if you completely ignore the source material.
Constantine is a demon hunter. He fights the forces of evil.
Outside forces seek to bring about the end of the world.
It's nothing we horror fans haven't prepared for. Other than a standout performance by Peter Stormare as The First of the Fallen, this film is seriously lacking in substance, though the effects looked cool.
If you like Keanu Reeves, give it a watch. Just be prepared to yawn once or twice.