Has there been any word on different materials for them? If not, I was hoping to stir up a discussion and maybe find an official answer so we can either confirm or deny these suspicions.
Okay, thanks to some recent posts I'm happy to say that there are at least two types of crossbows, one of them being Dwarven.
Lets hope that there are even more, including the other vanilla materials.
http://www.pcgamer.com/videos/skyrim-dawnguard-gameplay-interview-e3-2012-BWBWrZV1d24sS

i'd be happy with 3 or 4 normal crossbows then perhaps an uber special crossbow of the gods 
