I think he does comes back given that his mask if taken off already.
Hakuoro used to be an archaeologist, the god grant his wish of evolution just as he was about to die from a shot from his friend. He fused with god, the mask is the medium. He then entered a long sleep in the ice and was awaken later as iceman.
In the end I think god also grant his wish of being with love ones again by separate him from his entity. As the result, the mask is no longer needed and was left behind as seen in the ED. In the end he came back as a human, no mask etc.. Div probably got free as well.
no concrete evidence, but hey.. I believe.. I believe...