Seriously, that was wonderful to watch.  Nothing kept me entertained and intrigued as much as the 90's Batman cartoon did.  The current 'The Batman' series is miniscule and embarrassing compared to the maturity and sophistication of the older series (Batman Beyond was good, as well).  It's a shame most cartoons nowadays are built around marketing schemes rather than artistic and creative vision.  Nothing takes a risk any more.  Pretty much why I focus solely on mature anime now, though it's got its own share of stereotypical junk.

On a side note, did you know that Harley Quinn was an original character created for the animated series?  They liked her so much that she was later inserted into the official comics.  The same went for Terry McGuiness, the future Batman in Batman Beyond, which was an original storyline created specifically for television.