You may know Kevin Mellon as the artist behind Image's Heart, a comic about an office drone who follows his brother into the world of MMA, but his personal sketches are how I came across him. Make sure you check out the full version of his take on Ken Kelly's cover for KISS' Destroyer album. Iron Man's pose is just fantastic.
Daredevil colors by John Rauch.
Thor colors by John Rauch.
Psylocke colors by Rachelle Rosenberg.
You can keep up with Kevin's work by following his blog.