This question already has an answer here:
After watching some of DC's animated movies (Under the Red Hood and The Dark Knight Returns), I began wondering: Why don't other super heroes such as those in the Justice League help Batman? Or for that matter, why does each hero, in his or her own respective storyline, have to bear the burdens of crimefighting on their own shoulders?
While watching Batman getting brutally beaten in fights, I couldn't help but ask: Where the hell is Superman and co.?
Sorry if this question is out of place or is unnecessary. I've always just been curious about this.