Ninjago keeps appearing and disappearing. It's not consistently on the network, not even for reruns. That said, there's only three if you include that.
The strange thing is, there isn't all that many superhero kid's shows either. Mainly because WB and DC refuse to invest money in anything unless they have a high selling toyline, or it's as cheap to produce as TTG. The only real superhero cartoons I've seen is Disney XD's Marvel line up. Marvel essentially can't make a failure in entertainment media if it tried (Fantastic Four was Fox, Marvel under Disney's ownership had nothing to do with it). But WB couldn't make hits out of Young Justice, Green Lantern, or most puzzling Beware the Batman. Yep. They couldn't make their golden boy meal ticket Batman successful, though I suspect there was sabotage because he had a female sidekick and no one wants to make the female character an action figure, even though April O'Neil always managed to sell.
So, Marvel has 3 of these things at a time, and that's Ultimate Spider-Man, Guardians of the Galaxy (though I find that more of a sci-fi series), and Avengers Assemble. The Hulk series was only doing so so, and was canned. DC only has TTG, but if you want to get technical, that's their only show. They have several DTV movies for both kids and adult comic fans. And of course, those also include Lego DC films. Just no TV shows at the moment. It's been confirmed a new Justice League series is coming next year.