From what I saw of the trailer a while ago, the movie has absolutely jack shit to do with the comic book.
This. Remember when it was about a man who sold half his soul to the devil then fought off legions of demons, zombies, fallen angels, and their possessed followers? A tale of redemption, sacrifice, and struggle. Also with a pretty interesting old west setting.
Oh, wait. Nevermind. Brb making a movie about vampires in the future.
Also, which of them is even supposed to be Ivan? There's a guy who is presumably a priest and fight with throwing knives for some reason. Then there's the guy in the trench coat and hat that's blowing shit up. No idea what's even going on in that trailer.