Elmofongo: Beware the Batman and Green Lantern was meh.
Young Justice though I have not seen much of it (And thought Teen Titans was better) was a worthy successor to the old DCAU.
I think it's the exact opposite. Young Justice was overrated and not very well written (pretty though) and Green Lantern felt like it belonged in the DCAU. It was very well written, had great characters and provided some nice opportunities for them to grow.
stg83: Batman: Assault on Arkham was pretty good IMO, much edgier then any other animated movies since
Edgie it might have been, but mostly terribly stupid. The whole premise was idiotic. The head of a secret goverment intelligence force needs something done stealthy in Arkham... so sends in a team of crazy mercaneries, including a Hulk-like half-shark albino giant. They could not even drive into Gotham in a van or something, not edgy enough, they had to be dropped from a plane over goddamn Gotham. Stealthy as shit. I mean really, Waller could have just bribed a guard in Arkham and had him poison Riddler's soup. There, mission accomplished.
But what really pissed me off the most, was (SPOILERS) when Batman "joined" the Squad pretending to be the Black Spider. 1) Everyone knew that's Batman. I don't believe a single person in the audience bought that for a single second. 2) While undercover with the Squad, Batman just let them kill the guards at Arkham en masse.