- Complete Monster: Atrocitus is a terrorist who has been imprisoned on an abandoned world for 700 years. Killing the first person who crash lands there, he commences a killing spree of Green Lanterns by making them overuse their power rings so he can butcher them at his leisure. When his fourth target, Abin Sur, manages to defeat Atrocitus, Atrocitus tries to smash the Lantern's power battery to take the planet with him. After Atrocitus is captured, he tries to break Abin Sur by prophesying his best friend's fall to evil.
- Ensemble Dark Horse: Mogo, no surprise there.
- Laira was also quite well-received.
- Fridge Logic: Galius Zed makes a cameo in Laira's story as her predecessor, but he also appears alive and well among the other Green Lanterns in the main story.
- Hilarious in Hindsight: Nathan Fillion as Hal Jordan is a lot funnier if you've seen this back in 2009.
- It's not just funny, it's likely the reason they asked him to take on the role.
- Ho Yay: Sinestro and Abin Sur have this in spades.
- By extension, Hal and Sinestro. Their relationship in this movie is the friendliest compared to other incarnations. Hal even says the one Green Lantern he would trust the most to fight by his side would be Sinestro.
- Iron Woobie: Laira. She discovers that her father has been massacreing his enemies, and is forced to fight him in order to put a stop to it. Even though she wins, she is still helpless to stop him from killing himself in the hopes of regaining his lost honour. All things considered, she holds up very well.
- Les Yay: There's something ever so slightly suggestive about the way Arisia and Laira smile at each other.
- Nightmare Fuel: The Shadow Demons. What they do to a Green Lantern at the start of the film is nothing short of horrific.
- Tear Jerker: Deegan's death.
- Laira's father committing suicide.
- Abin Sur not believing Atrocitus when he tells him that Sinestro is fated to become a universe shattering enemy of the Green Lantern Corps - the unwavering faith Abin has in his long time friend just makes the knowledge of what Sinestro eventually becomes that much harder.
YMMV / Green Lantern: Emerald Knights