He-man and Skeletor by Rob Haynes

This was originally credited by the auction house to Craig Rousseau.
When showed the piece for confirmation (as it's unsigned), Craig's response was "I 
LOVE that piece. it's not by me... i kinda WISH i did it, though.. ha!"

I posted this art on the He-Man.org forums and Val Staples identified the artist as Rob Haynes.