This has been out for a while but I just got around to it. Loved it. They finally just broke down and made a new Batman TAS episode.
That one flew under my radar *because* it's another BTAS episode, I think. I saw it pop up here and there but never watched a trailer or anything operating under the assumption at a glance that it was a collection of Harley Quinn episodes from the series bundled together.
I liked it a lot overall but I admit one thing that bugged me was the voice for Harley as the rest were so good and with how it looked I just kept expecting it to sound like her in the series and it kept poking at me.