How much experience have you had with digital? The picture is going to resemble Disney cell animation, meaning it'll be flat, without shading. So it won't demand extensive digital paint work.
It's totally up to you if you still want to do it. But I'm afraid I can't accept traditional work. However, if you change your mind about drawing Drax, you can make a GOTG piece for the rest of the fanart portion of the Moviepilot article. What would you like to do?