Turntable rendering time

I took some vacation in Brazil, just got back with a nice tan hehe..
At this point Batman Beyond is pretty much done. All rigged, skinned, textured and modeled. Now it's time to render this badboy's turntable that is taking 20 min for each frame. Like Darkseid, I'm using Maya 2010, Mental Ray fine trace, F.G. I used Xnormal for baking my Occ, Normals, and Polypaint. I used the same base mesh that I used for Darkseid, I just add the ears.
cheers