An actul comic book, quite an interesting development, off the top of my head I can not think of any game companies that have made that step before. The way I see it, it could eithier make certain people more attached to their favorite class, or if written rather poorly coupled with the subtraction of interactivity with the game itself, could distance some people. But due to the infalibility of valve, I sincerly doubt that anything truely negative could come out of this slight change of pace.
-This-is-Hip-Hop