I never watched beyond but I will take your word for it that its good since I haven't seen any animation batman gone bad.
Pretty much, but they weave in the old Batman cast pretty nicely since the same guys who made TAS made it. Bruce works out of the batcave like Alfred used to, Barbara Gordon is now the Commissioner, etc.
But what would make it stand out is its rogues gallery. They could go dark with it but with WB being as money-grubbing as they seem, they could go colourful and PG with it too since it was a kid's cartoon show.
Of course this would never happen, though. They're more likely to shoehorn the word "Arkham" into a new series with plenty of DLC/MT or something.