It's /vg/ for comics, seriously, it would be /gweng/, /supg/, /batg/, etc and be a huge circlejerk. Trying to talk about anything other than capeshit would just be regulated to a /indie/ or some shit.>/toon/ cartoon
Think of ONLY /sug/, /lhg/, and other shit-tier generals posting 24/7 about nothing. Think about how many generals there would be, and what OTHER discussion could there be? "Starfire Raven thread XDDD." "Lori best girl?" "I wanna hug the bunny" or some shit like that.
Neither board would have the population to sustain itself and there would be so much cross-board talk that it would just be /co/ but more stupid.