I've been waiting for this one a long time and it paid out. Like every other Justice League animated film, it's full to the brink with awesome. This one is an adaptation of Mark Waid's brilliant story JLA: Tower of Babel, where Batman's extreme preparedness jeopardizes the entire Justice League, as well as himself.
It's quite gripping as it offers insight into Bats' mind and the elusive weaknesses every member of the JL possesses. Oh, and the action... Amazing.
What's also interesting and ultimately satisfying is that everyone reprised their Bats and Sups TAS roles giving every fan and follower that wonderful sense of familiarity. Kevin Conroy as Bats, Tim Daly as Sups, Susan Eisenberg as Diana, Michael Rosenbaum as Flash, Phil Morris as Savage and many more. It's just a great move by DC and great guidance by the ever-loved Andrea Romano.
Now, what I always like to ask myself is: How does it cope with the previous JL movies?
And the thing is, they're amazingly on par. Perhaps, subjectively, slightly behind Crysis On Two Earths, which is the best one, imo.
So, being a fan... Solid 8 out of 10.
