Paul Dini: Superhero cartoon execs don't want largely female audiences
tl;dr Executives are quoted as demanding shows work towards appealing to boys because "boys buy more toys," refusing to acknowledge girls do buy toys (doll sales more were double action hero sales last year) and/or marketing products girls might want, even going as far as to cancel shows with large audiences of girls.
What lame-asses. Adventure Time works towards appealing to everyone, markets all kinds of products for kids and adults and males and females, and has been hugely successful. It's not hard to sell things to females--my Etsy store is mostly fandom stuff and has over 4.5k sales.
I heard Young Justice was good too. Bummer.