I remember only very sketchy details... I believe it was a full graphic novel, mostly black cover, glossy pages I think... The premise was something of a civil war, or a war between Earth and the heroes... I think Superman might
have been bad in it, that's not a definite.
What I am almost positive about is
Atom Man was split. I tried searching Google for things like "splits Atom Man" but got nothing but science websites and the wiki on Atom Man himself. Anyhow, I believe it was an arrow that actually splits Atom Man. It's... so cheesy. Not in a bad way, but... Oh man...
Anyhow, this novel also would have to be at least a few years old, as I remember flipping through it at my friend's house around '05 or '06.
: Oh, uh... There's a thread for these sorts of... I missed it, see... And now I can't delete this one...
(There is a questions thread, you know.)
edit: shit you realized that too