Babylon 5 was the greatest show of the 1990s, not just in the sci-fi genre, and a television revolution who's influence can been seen from The Wire to A Game of Thrones.
This one off animation on the other hand is utter trash from start to finish, it actually strikes me as an act of intentional self-destruction against the franchise on the part of JMS.
I'll just give you bullet points:
* Poor storyline that relies on nostalgic cheap laughs that basically amount to Boom! and Zathras jokes ad nauseum.
* Stale multiverse trope overused in every other popular franchise just lately.
* Environmentalist propaganda on Minbar! Minbar for crying out loud! The cleanest planet in the known universe!
* Lovecraftian Shadow ships and the Shadows themselves, the most ancient and advanced civilization in the galaxy, reduced to army ants.
* Out of character Vorlons sadistically crashing the Moon into the Earth.
A note to JMS who has blocked me on Twitter for my honest review.
What was the first piece of advice that Harlan Ellison, the man who's estate you now execute, gave to you?
STOP WRITING S**T.
Take heed.