Avengers 4 - original artwork by me, Thor/Cap/Iron Man colors by Jeremy Roberts, Hulk colors by me - currently working on a Hawkeye to continue the piece. Giant Man/Wasp, Pietro and Wanda in the plans as well. Digital paints over original linework.
The original Iron Man piece was done as a pen and ink donation to the Hero Initiative, a foundation that provides monetary assistance to comic book artists in need of medical care. After I had done that piece, I thought I should do Thor, then Cap, and finally Hulk to match.
Jeremy approached me to do the color work on the first 3 (I had not done the Hulk yet), and I loved what he had done and had been dabbling in photoshop at the time myself and decided to add color to the Hulk as well.
Needless to say, I plan to continue the piece...