well, considering that Orion is intended for beyond LEO missions including Mars...

Orion is pretty unsuited for a mission as long as a Mars trip. So I doubt the spacecraft used for that would have anything to do with what they are currently calling Orion.

be my guest http://en.wikipedia.org/wiki/Orion_%28spacecraft%29 . Search for "Mars".

Of course, it wouldn't be the "long-term deep space habitat" module - that would be a specialized module.