My super soldier character sculpt in-progress in Blender. It is still rough around the edges, quite literally.
After I finish sculpting and retopologize, I will rig the character in Maya, then re-target my motion capture animations in Motion Builder. I will not be re-rigging in Blender, because Blender rigs do not appear to be compatible with Motion Builder. It results in incorrect rotations which destroy the motion of the mocap take.
After I am done rigging, I will build a character controller in Unity and utilize Unity IK and other Mecanim features where appropriate.