The Justice League reluctantly teams up with the Secret Society to repel Darkseid's full-scale invasion of Earth. As the League and Secret Society members battle the Apokolips fleet across the planet, Superman, Batman, and Lex Luthor take on Darkseid.
This episode includes examples of:
- Agony Beam: Darkseid's "agony matrix", which activates every pain sensor in the target's body at once...and then leaves them on.
- Alien Invasion: Darkseid's forces invade basically everywhere on Earth at once.
- And the Adventure Continues: The Trope Namer
- Back for the Finale: J'onn.
- Back-to-Back Badasses: Luthor and Batman.
- Badass Boast: Darkseid, natch."I'm more powerful than I've ever been and the last time we met, you barely managed to hold your own."
"Super or otherwise, you're merely a man. And I am a god!"
Metron: Only a twelfth-level intellect has the slightest hope of surviving what you are about to experience.Luthor: Then I'm over-qualified.
- From Luthor:
- Badass Grandpa: A random elderly bystander at the Great Wall proclaims his wish to help against the Parademons despite Diana telling him to stay back. Cue said "old man" punching out two Parademons with one hit each, then revealing himself to be none other than Jonn J'onzz
- Betrayal Insurance: When divided into teams, a single Society member was placed outnumbered with a group of Leaguers to curb possibilities of double-cross.Wonder Woman: Trust, but verify.
- Body Wipe: The final "cut to black" is provided by Batman running directly into the camera until his bat logo fills the screen.
- Batman was the first hero in the DCAU franchise to appear onscreen, and he's the last one seen in this episode. Also, Kevin Conroy had the second line in the first Batman: TAS episode "On Leather Wings" (as an incidental character) and gets the second-to-last line here.
- Like the first episode of this series, this episode sees the team needing to defeat an alien invasion.
- Within the episode itself, both the beginning and closing shots take place on the Metro Tower.
- Call-Forward: Superman's quip about Batman getting soft in his old age.
- Curtain Call: Pretty much the entire team running/flying down the steps of the Metro Tower. The groups are broken up into different teams from the comics before concluding with the show's Big seven (and within that, the Big Three).
- Deader Than Dead: It's implied that, when Luthor returns with the Anti-Life Equation, showing it to Darkseid results in them both being fused to the Source Wall, rendered incapable of ever interacting with the multiverse again. Word of God asserts that this is exactly what happened, meaning Luthor and Darkseid have been effectively annihilated.
- Did You Just Flip Off Cthulhu?: Batman manages to almost knock Darkseid down and manages to avoid his Omega beams.
- Doesn't Like Guns: Luthor offers Batman his spare pistol when he runs out of batarangs, but not even this desperate situation will get him to take it.
- Enemy Mine: The villains argue that they should be allowed to help fight the invaders because they have just as much interest in stopping Darkseid as the heroes, and Batman agrees that the heroes need all the help they can get.
- Evil Versus Oblivion: Luthor and his cohorts vs Darkseid.
- Exactly What I Aimed At: Flash and GL hurl one of Darkseid's doomsday devices into the sky. They wanted to throw it to the sun, but the trajectory was "slightly" off...it hit a warship instead.
- Fate Worse than Death: The Agony Matrix.Darkseid: Imagine the worst pain you've ever felt in your life, times a thousand. Now imagine that pain continuing forever. Oh, that's right. You don't have to imagine.
- One that's only revealed via Word of God, but Luthor and Darkseid wind up fused to the Source Wall in the end, trapping them immobile at the ever-expanding edge of the universe with no way of interacting with any reality ever again.
- Foregone Conclusion: Darkseid may have seemingly taken whatever was left of Brainiac into the Source Wall, but we all know another part of him survived elsewhere in order for him to return by "New Kids In Town".
- Godzilla Threshold: Darkseid has pressed one too many of Superman's buttons, so Supes finally decides to unleash his full strength.
- Gondor Calls for Aid: Various Leaguers are shown suiting up in preparation for the battle.
- The Good, the Bad, and the Evil: The League (good) and the Society (bad) against Apokolips (evil).
- Gory Discretion Shot: Commander Steel basically decapitates a Parademon with a thrown shield. All we see is the Parademon collapsing, followed by the shield embedding itself in the drill tank.
- Grand Finale: For the entire DCAU.
- Hostile Terraforming: Darkseid's army drops magma towers in order to create fire pits ("Apokolips on Earth" as Steel puts it).
- Hurl It into the Sun: Wally half-seriously suggests John do this to one of the drills. John promptly forms a giant catapult construct and has Wally carve a trench into the earth with his speed.John: Doesn't look like it quite made escape velocity.
Wally: Nope. (drill hits one of the enemy ships) Good effort, though.
- I Warned You: Metron tells Luthor that the Darkseid fiasco was the expected result of Luthor ignoring his previous warning.
- Ironic Echo: "Let's go."
- It's All About Me: Luthor declares that he isn't there to help save the world; everybody else is there to help him get revenge on Darkseid.
- Lawyer-Friendly Cameo: one of the effigies in the Source Wall looks suspiciously like Galactus of the Marvel Universe.
- Megaton Punch: Superman sends Darkseid flying across Metropolis.
- Mercy Kill: In response to Superman surviving the effects of the Agony Matrix, Darkseid says this:"Still alive. You impress me, Kryptonian. More...your valor has touched my heart. Oh yes, there is still some small part of me that knows mercy. I will end your pain with something special I've been saving for just this occasion. (takes out a Kryptonite knife) I'm going to carve out your heart and put it on a pike in my throne room."
- Mercy Lead: When Atomic Skull protests that being arrested is poor repayment for the villains' help, Batman offers them a five-minute head start. When they see that's the best deal they're going to get, they take off (though Giganta takes a moment to give Flash a kiss).
- Monumental Battle: battles take place near the vicinity of the Eiffel Tower, the Great Wall of China, Big Ben, and the Washington Monument.
- Precision F-Strike/Gosh Dang It to Heck!:Superman: (angrily) C'mon, it's Lex flippin' Luthor!
- Save the Villain:
- Batman saves Lex after Darkseid blasts him off the top of the Daily Planet building.
- Shining Knight catches Star Sapphire in midair after she gets knocked out.
- Inverted by Atomic Skull, who shows he's taking the Enemy Mine thing seriously when he rescues an injured Shayera.
- Tempting Fate: When Luthor bets that Darkseid won't notice Superman, Batman and himself battling atop of the Daily Planet.
- Throwing Your Shield Always Works: Commander Steel, much like another patriotic superhero.
- Trash the Set: Darkseid takes the Daily Planet roof globe and throws it down through the building. You even see one shot of it going through Clark and Lois' office.
- Uncertain Doom: The fate of Luthor and Darkseid.Batman: I doubt that either of them died.
Superman: We saw it this time.
Flash: You saw it last time, too.
- The Worf Barrage: After the "World of Cardboard" Speech and the pummeling Darkseid receives, he just gets up without any visible injuries, tells Superman that he hasn't got enough yet, and when the guy charges at him, he throws the Agony Matrix at him and would have killed him if not for Luthor.
- "World of Cardboard" Speech: Trope NamerSuperman: That man won't quit as long as he can still draw a breath. None of my teammates will. Me? I've got a different problem. I feel like I live in a world made of cardboard, always taking constant care not to break something, to break someone. Never allowing myself to lose control even for a moment, or someone could die. But you can take it, can't you, big man? What we have here is a rare opportunity for me to cut loose and show you just how powerful I really am.
- Worthy Opponent: Darkseid was genuinely impressed that Batman was the first one to ever evade his Omega Beam. Same with Lex when he thought of trying his Omega Beam on him to see what he was as agile as Batman, and Lex just ran away.Darkseid: Excellent strategy.