YMMV / Justice League Action

• Adorkable:
  • Stargirl really embraces this due to how she's a cute and spunky teenager girl with some dorky moments.
  • Wonder Woman shows this when she has a more childish side when laughing at something funny.
• Awesome Music: The show's rendition of the Batman: The Animated Series opening theme in "Time Share".
• Big-Lipped Alligator Moment: The weirdly significant moment of Space Cabbie's GPS leaving at the end of "Barehanded" is this for those that have not seen Green Lantern: The Animated Series due to Continuity Lockout. Space Cabbie himself also calls it weird.
• Continuity Lockout: The significance of Space Cabbie's GPS vaguely recognizing Green Lantern and then leaving in "Barehanded" will likely make very little sense to those who have never seen Green Lantern: The Animated Series. Lampshaded when Space Cabbie states "...Well, that was weird."
• Crazy Is Cool: Booster Gold's watched Jurassic Park and decided to use time travel to start an actual one up.
• Crosses the Line Twice: In "Follow the Space Cabbie": Mr. Mind getting accidentally stepped on and squashed by Lobo? Dark, but still kind of funny. Showing us Mr. Mind screaming in terror before getting squashed by Lobo three times, from three different angles, with detailed shots of his body splattering everywhere in a cloud of green goo, his scream of terror getting more drawn out in slow-mo each time, and a horrified Space Cabbie remarking that he's going to be sick? Hilarious.
• Cult Classic: The show went under the radar of a lot of folks due to being badly advertised and many that did see its ads were skeptical of its lighter take on the Justice League, however a majority of those who have watched the show have loved it and really wished it got more recognition.
• Ensemble Dark Horse:
  • Stargirl, who is more Adorkable and less bossy compared to her DC Animated Universe version.
  • Joker, with Mark Hamill once again taking the reigns. This version is downright hilarious and an absolute blast to watch, while being far more likable as a person given his Adaptational Nice Guy make over.
  • Dex-Starr of the Red Lanterns is already gaining popularity over his adorableness.
  • Mark Hamill, with people praising his web short due to hilariously invoking the fact he voices the Joker in the short itself as a plot point, where he throws his Joker voice while riding with the Joker himself to confuse the Trickster — and vice versa. (And yes, Hamill also voices the Trickster!)
  • Speaking of Mark Hamill, Swamp Thing has been getting a lot of love for his frequent appearances in this series and being voiced by the man himself. Helped by his snarky but otherwise kind personality.
  • Crouching Moron, Hidden Badass Plastic Man's impressive powers and hilarious antics make him such an iconic part of the show that it's hard to believe he's in less than 1/5th of the episodes.
  • Lashina only appears in one episode and has no dialogue. However, she might be Darkseid's most popular minion due to her combat skills and bashfully pausing to bow for a crowd of people who thought that a battle was part of a show.
• Esoteric Happy Ending: The ending to "All Aboard the Space Train" has Jonah Hex deciding to live on a desert planet devoid of all intelligent life since he feels that it's where he belongs now due to being unable to return to his own time period. However, there's also no sign of food, water, shelter, or other basic human necessities to allow him to live a long fulfilling life as far as we know.
• Evil Is Cool: The Red Lanterns are an organization of rational villains who follow a strict code of conduct and strategy as opposed to the generic doomsday villains on the show.
• Fandom Rivalry: Do we even have to say it? JLA's screwy scheduling and consistently Invisible Advertising, in contrast to (unsurprisingly) Teen Titans Go! really doesn't help to abate such a rivalry in the slightest.
• The Firefly Effect: Many fans feared this, due to the general screwing over of action cartoons, and the death of DC Nation fresh in many minds. They were sadly proven right when the series was quietly cancelled after its first season.
• Friendly Fandoms: The show has gotten on pretty well with fans of Justice League and Batman: The Brave and the Bold. Both shows made a similar point of showcasing various DC heroes and villains both obscure and popular in various action packed adventures, with fans of the former particularly appreciating the solid animation, characterization, and action scenes and fans of the latter appreciating the show taking a more fun and light-hearted approach towards the DC universe while still knowing when to get serious.
• Growing the Beard: The show already started out well, but later episodes like "Cube Root", "The Brain Buster", and "Harley Goes Ape" really shows that the crew is willing to experiment and produce better stories. For example, the first one does not have any of the main three Justice League members. It's all Firestorm, Martin Stein, and Mister Terrific. The second one has Lex Luthor in it, but the main heroes are Batman and Mister Terrific, not Superman. The third one has two heroes and two villains, Superman, Stargirl, Harley Quinn, and Gorilla Grodd. A combination like that seems weird, yet all the interactions feel sharp and spot on, especially with Harley
• Harsher in Hindsight: In the "Lasso of Lies" short, Wonder Woman uses the Lasso of Truth on Booster Gold, and during his truth-compelled rant he mentions that he's "Terrible at caring for the things he loves". This becomes harsh after watching the episode "She Wore Red Velvet" where we learn that Booster is in love with an heiress from his time, and that he was going to marry her, but he was broke at the time, so during the wedding, he traveled back in time to gain enough money to support the two of them. She became the villain Red Velvet in the future, pursuing him for revenge, and everyone assumed it was for not returning and so Batman and Wonder Woman rush him back to the altar…and it turns out she doesn't hate him for not returning, but for being the worst husband ever. When Red Velvet tells the younger Margo what it's like, Margo takes off her wedding ring and dumps Booster after hearing some of the things her future self says. Red Velvet fades, having never become a villain because she was better off without Booster.
• Hilarious in Hindsight:
  • A few people, including Grant Morrison, believe Hercules to be one of the best Superman movies ever made, if not the best. Now, James Woods is providing vocal work for Superman's Arch-Enemy, Lex Luthor. Better yet, at one point Luthor absorbs the power of Zeus, who Disney Hades absolutely despised.
  • On Ultimate Spider-Man (2012), Tara Strong voiced Mary Jane Watson who, unlike other versions of the character, aspired to be a reporter and was not in a romantic relationship. Here, she voices Lois Lane, who is a reporter, and isn't in a relationship with Superman.
• Magnificent Bastard: The Joker is a diabolical criminal mastermind and the Arch-Enemy of Batman. Joker's laughing gas bomb remains hidden in Gotham until 5 minutes before it blows, where Joker is undeterred when it is finally found. Upon acquiring a Mother Box, Joker breaks Lex Luthor out of prison and treats him to the "Best Day Ever", where his mysterious motive is attracting superheroes from all over the world to follow them to Lex's hideout where a powerful bomb awaits, so all the heroes will be caught in the blast radius. After kidnapping Batman, Joker leaves a trail of clues to his captive, which only the Riddler can make sense of, but even he is outsmarted by the Joker who leaves a trap that would activate and kill Batman if a riddle was correctly answered, knowing Riddler cannot resist answering. In spite of his penchant for mischief, Joker can just as easily be doing something harmless like attending Booster Gold's Watchtower Tour. Just as cunning as ever, this Joker also shows himself to be far less cruel and sadistic than usual.
• Memetic Mutation: The "These men are your friends, Diana?" exchange became inevitably copied on any discussion of the show on /co/ after a small minority got extremely angry about it.
• Moe: Pretty much all the young heroes are this, but Stargirl is definitely this.
• Nausea Fuel: Mister Mind getting crushed under Lobo's bootheel in Follow That Space Cab!, which was shown three times and shockingly gory by the series' standards. Space Cabbie looks sick and mumbles he may vomit as a result.
• Older Than They Think:
  • If you balk at Lex's portrayal (an evil Gadgeteer Genius instead of a Corrupt Corporate Executive Villain with Good Publicity), know that this is how he was originally portrayed prior to The '80s (the Fridge Logic of Cut Lex Luthor a Check set in, and using his genius to get rich is his PostCrisis backstory.) and when his 'good publicity' has failed him, he has fallen back on his prowess as an inventor.
  • Similarly, Wonder Woman has both dealt and taken Superman-level damage, but been helpless when restrained in ways you'd think she could easily break out of. That's because being bound was originally her Kryptonite Factor, typically ignored from the Silver Age onwards.^note The rationale for this had less to do with needing a believable weakness for the character and more to do with the fact that William Marston was super into BDSM. The people behind this show really know their comics history.
• The Scrappy: The show's incarnation of Hippolyta has earned some scorn from fans thanks to her obnoxious Does Not Like Men attitude and coming across as ungrateful to the male heroes who saved her island. It doesn't help that she was willing to allow her own daughter Diana to die by Circe's hands just to ensure that the villainess would never beat her.
• Shocking Moments: Barehanded has the surprise guest appearance of Aya.
• They Wasted a Perfectly Good Character: Plenty of colorful Justice League members only appear sparingly, but with just two speaking appearances, Vixen stands out as an underused character after her fighting scenes in "Garden of Evil".
• They Wasted a Perfectly Good Plot:
  • A minor example, but some viewers have have lamented that "Play Date", the one episode focusing on fighting video games, did not have a Injustice: Gods Among Us reference, although the episode itself is already packed with many references of its own.
  • "Speed Demon" opens with Harley Quinn having magical powers. This is something which could have provided plenty of material for an entire episode, but she is instantly defeated by Zatanna and it just sets the real plot of the episode in motion.
• Unexpected Character:
  • Promotional media revealed that one of the heroes that the show features is Space Cabbie, of all characters! He's even in the opening credits!
  • Not to mention it's a children's cartoon frequently guest starring JOHN CONSTANTINE! And for much the same reasons, Swamp Thing.
  • Dex-Starr, the Red Lantern Cat.
  • Has anyone expected Roxy Rocket to make an appearance?
  • The animated debut of the Nuclear Family, members of The Outsiders' rogues gallery. With 1950s cheese and all.
  • While time travel was involved, Carmine Falcone (a normal crime boss from Batman's early days) appears. He's had more media appearances in recent years unlike other truly obscure DC characters, but you'd think he's a bit too adult for a more kid-friendly series.
  • Cain, one of the House of Mystery hosts, is featured in the Halloween-themed episode.
  • One of the episodes is called "Superman Red vs Superman Blue". The reason why the titular characters' appearance is such a surprise is because they're from the fan-despised Superman Red/Superman Blue story arc, which was based off of an old Silver-Age "Imaginary Story" and split Superman into two Energy Beings to try to change Superman forever (it didn't last). The storyline has never had any actual representation on any other form of media up until this point, with the closest thing being light allusions.
  • In "The Ringer", Despotellis being inside Sinestro's ring was surprising. Many expected Parallax.
  • It's probably safe to say that nobody expected Aya to return after a long absence from television.
• Win Back the Crowd: From the clips released, many fans have taken a massive warming to the series, noting how they mix the action and adventure of the old DCAU with the comedy of the initial Teen Titans (2003) cartoon series, with some seeing this as a Spiritual Successor to the series. Some even see this as an apology for alienating fans via Teen Titans Go! But because of Cartoon Network doing squat to advertise the series, not many fans could actually see the show and there are several people that are unaware of the show's existence.

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