Don't know but i have a feeling that near the end when that huge monster came out of the window,i felt i saw "Doom3" monster last stage in real action.i know it sounds funny but that game had same monsters... :P
The "Doom" monster you're referring to would be the Hell Knight. Personally, I think a Hell Knight from Doom 3 would lose to the giant demon at the end despite the fact that it could throw fireballs. That demon at the end of the movie was HUGE and seemed invincible until what happens in the end.
Welcome to my Nightmare- Freddy Krueger