These are really interesting points. I want to do a whole post on the subject of adults writing adult things in originally children's universes. I'm not sure if fic based on cartoons is different or not... I don't play in that space and haven't watched much cartoon stuff since Clone Wars stopped being a thing in the house. But I know a lot of people who write in the DCU and other verses and some on this Flist are really into Avatar and Young Justice. I was surprised at the resistance to it all in this fandom as I'd wandered through so many others that were originally kids or young adult but the best stuff was written by and for adults. There is really this feeling among some that THIS IS FOR KIDS SO SHAME ON YOU. Excellent points!