Usually, when children are involved with superhero storylines, nothing good is ever produced. As long as the hero's are in, at least their late teens ( 18-19) It may have a shot of being something other than silly. I am sure the "hero's of tomorrow" will be portrayed as young teenagers. Even as a child i never liked to see young kids take the lead of being a hero. It doesnt appeal to me and comes off as pure fluff. This is just my opinion though and i can certainly see how a younger audience could relate to having younger superhero's. The story sounds very promising and Marvel has made two very decent animated movies. So, maybe this will be a third