I just finished this for church. It's our first of a series of super hero trading cards, loosely based on the 252 Basics virtues. It didn't come out too bad, considering that I only got to spend about 5 hours on it. The basic character shape is modified from an online superhero creator. I wasn't too happy about doing that without copyright clearance, but the site encourages people to share their creations, take screenshots, etc. so I think they implied permission to use it in a non-profit way.
Here's the original concept drawing from one of the kids. I think I captured his intent. I've got a half dozen more concept drawings for other cards. If I spend the time on them I might be able to develop an actual comic style, which I've never done. I didn't even doodle comic character sketches as a kid.