the show it self was great, but I think they should have brought back some other villians such as poison Ivy , the Riddler , Clay face & maybe Scarecrow ( I know that they had Mr. Freeze , Raz Al Ghoul , Starro, Man-Bat ( when Terry got spliced with bat dna), Bane , Joker & Harley Quinn( return of the Joker) , The royal flush gang & more).
The style. I really love Bruce Timm's work and this was really defined, edgy and slick. At the same time, you knew it was Gotham and even though it was different, you knew it had once been the original Batman's home.