The hair looks nice, but it has too much faces to work with. 

First step: decimate the hair.
Second: Import the .obj model of Superman body.
Third: Adjust the hair to the head. 

Using this image as a model, I can now begin to sculpt the hair and delete the faces that I won't use. 

Working on the sideburns next: right side and left side. 

And finally addind the top. It is a decimated mesh. The top was separated from the rest of the hair so I could work on it more easily: sculpting and giving the correct shape before merging it to the rest. 

And here goes nothing, after 5 hours of hard work, the final result in Blender looks kinda fine to me. Next step: export it to Character Creator for texturing. 
Any thoughts ? 

Feel free to tell me what you think, good stuff and bad stuff ! =)

The hair really brings it together, very impressive!
Great work!

Thank you so much for your kind comment!

Next step: Import the obj model into Character Creator and play around with the textures provided by DazStudio. Play around with the layers (roughness, metallic, micro roughness) to find a goodlooking result. 

And here are some renders of the hair (SSS textured)