Sometimes an artist will draw something and put it aside, with the intention of working on it later or utilizing it as a submissions pack. Here are a series of pics that I did some time ago, and didn't post it in my DA gallery. This sort of thing is commonly called sequential art, in which you are supposed to tell a fluent story, compressed into drafted panels of varied shapes/sizes.
This 5-page set was made with the Marvel group called The Ultimates [or The Ultimate Avengers]. They are like an elite team of Superhero Marines. The story is self-explanatory [the heroes storm a corporate building and attack aliens that are disguised as human civilians] and was inspired by a graphic novel drawn by Bryan Hitch. Characters are owned by Marvel.
More portfolio samples are available via these 2 links:
PENCIL WORK ONLY
MORE INKS AND COLORS