That's all well and groovy, but Batman is not DC's only top tier character, nor is he everybody's favorite DC character. That's what's wrong with that. It wouldn't kill DC to toss some of their other heroes a bone on TV once in a while. Don't get me wrong, I'm not dissing the Dark Knight or anything, but really, how many times can we see Batman and Robin chasing after the Joker, the Penguin and Two-Face before it gets old? I don't think a new DC animated series without the word "Bat" in the title is such a tall order.
Why can't we get a post-Crisis Superman series? Or an All-Star Superman series? Heck, why couldn't we have gotten a DC Comics Presents series instead of Batman: The Brave & the Bold? Does Batman really have to be at the helm of every single DC TV project?
Respectfully, I must disagree. No, Superman Returns wasn't a great movie, but that doesn't mean that Superman isn't a marketable franchise. SR was just a poorly executed film: little to no fight scenes, too long, turning the man of Steel into a deadbeat dad, etc. Supes fared poorly in the wrong hands, so all it would take is for someone to put the character into the right hands. I refuse to believe that there's no audience for Supes and that he can't be done right again.
As stated above, I personally don't consider Legion of Super Heroes to be a Superman show, but rather a team-based show with Superman as its' anchor, so that's not really the same thing IMO.
To sum up: if DC is going to let the Batfans geek out over their favorite character in show after show, movie after movie, DTV after DTV, they could at least allow the geeks for of DC's other premier characters (including the Man of Steel) the same courtesy.