I'm in a mini-comics class right now, and our first assignment was to make a portfolio book of recent work. The actual goal for the project was to practice reproducing and binding books, but it needed content as well. Anyway, the night before it was due I remembered I needed a cover -- so here's what I came up with.
There are no space marines in the entire comic... in fact, it's not really even a comic at all. I had a laugh making the cover though.