Yes. I'm using the darker MW pack right now (along with the darker weathers). As for a particular effect... nothing comes to mind, I just want it to be darker. Here is a SS from DS if you'd like: http://www.play3.de/wp-content/gallery/demons-soul/fm2bk4.jpg I'll try toying around with a bloom shader like you suggested.
I was being sarcastic with the bloom, just playing on the fact that at least some of the trailers have
a lot of bloom and very many shiny things.
As for that shot, at first glance it looks like the usual. Bloom, brown and contrast.
You can use the color mood shader I converted from Crysis to make the scene more brown, there are plenty of bloom shaders around, and I think there's a contrast-booster on the MGE shader library wiki. If none of those work, I can look into putting something else together.