Thanks a bunch guys! I really appreciate the feedback. Here's the poser/photoshop breakdown.
The building (which is actually just a sci-fi wall w/ a door), the sky, the bodies, and all the lighting were done in poser. That took pretty much a day.
The costumes, the sun rays, the bats were all done from scratch in photoshop. (another day)
The hard part was trying to have Supes in the light, and Bats in the shadows, together in the same frame. I also really tried to have a more "fabricy" look to the capes. Once again, I kept referencing Alex Ross' work and tried to emulate his stuff. Thanks again! -Leif.
As Brick asked, how much of this is poser and how much was Photoshop? I've considered picking up poser, but had also heard it was a bear to work with...
At any rate, this is amazing stuff. Batman in particular looks terrific, you really got the dark feel there.