- Alternative Character Interpretation: Talia may be lying that the Lazarus Pit won't revive Ra's. After all, given her often tumultuous relationship with him, it might have been a good opportunity for her to eliminate him for good. She is, after all, willing to rape Batman to conceive a child. Also, she doesn't seem to be very broken up about Ra's death.
- Angst? What Angst?: Talia Al-Ghul doesn't seem too upset about her father's death. This is lampshaded by Batman. Possibly explained by Epileptic Trees.
- Base-Breaking Character: Both Damian Wayne's scrappydom and fandom start here. On one end he's a scrappy due to being extremely unlikable and performing extremely improbable feats for kid his age, while on the other it's clear he's being set up for greater Character Development over the course of the Animated DCU. It's up to the viewer to decide whether they enjoy him or not.
- Complete Monster: Slade Wilson, aka Deathstroke the Terminator, is a contract killer who'd shown promise to be Ra's Al-Ghul's successor as leader of the League of Assassins. Ra's ended up choosing Bruce Wayne as his heir instead, making Slade turn on Ra's due to this rejection and slaughter many of the group's assassins in his hostile takeover. He manipulated and abused Bruce's son Damian Wayne in order to keep him in line; conducted Lazarus Pit experiments to create flying Man-Bat assassins which he'd planned on selling off as slave mercenaries; tortured Damian's mother Talia al Ghul and made Damian watch; and attempted to kill the Bat-Family, Damian included. He is later saved from death and serves Brother Blood as part of a contract to take out the Teen Titans and deliver them to Blood in order to have the young teens drained of their life force, granting Blood their powers. To carry this out, Slade sends Terra Markov, a teenage girl he's raised and groomed to follow in his footsteps, to infiltrate the Titans as The Mole and ultimately betray them over to his side. Damian Wayne gets betrayed and captured ahead of schedule, so Slade wastes no opportunity to beat the crap out of him and attempt to break him as vengeance for costing him the League of Assassins. Slade's made Terra so dependent on him after having saved her life that she's developed a romantic attraction to him, a much older man, and uses this by promising her they can be together once the job is completed. But when he's seemingly killed Nightwing and is told by Brother Blood that he needs a Titan in Nightwing's place to complete the contract and be paid at full price, Slade has zero problem turning Terra over to have her life and power drained, coldly telling her "Sorry kid, but a contract is a contract."
- Epileptic Trees: Quite a few people think Ra's is just hiding, as we never see what happened to his body and this is Ra's Al-Ghul.
- Just Here for Godzilla:
- Some are here just for another animated Nightwing appearance.
- The same with Damian, especially since Comic!Damian was dead at the time that this movie was released.
- During Slade's attack on Ra's' fortress, you can see one guy literally just... stop when a Slade mook is pointing a gun at him and try to block it instead of, you know, just killing him. The fact that he stopped to block makes it look pretty stupid.
- It's hard to tell if the cut from Nightwing saying "It's impossible." to Damian swimming out to the oil rig is meant to be played for laughs or not.
- One-Scene Wonder: Ra's Al-Ghul only shows up once before being rendered Deader Than Dead, but what an appearance it is. Plenty of ninjas get sliced and diced before Slade finally shows up. From there though, he's done.
- Scenery Porn: All of the background paintings are beautifully rendered, but the lights reflecting off the water in Gotham Harbor and the establishing shots of the oil rig at sunset are gorgeous.
- The Scrappy:
- Take That, Scrappy!:
- They Wasted a Perfectly Good Plot: Batman and Deathstroke get very little interaction in the movie even though Deathstroke's plan is basically out of jealousy of him and even in Deathstroke's rant at the end everything he says is pointed towards Bruce and sounds like it'd be better said to him than Damian.
- Unintentionally Unsympathetic: Talia reveals that she had to drug Bruce and rape him in order for Damian to even be born, an action that has not exactly helped her popularity.
- What an Idiot!: Deathstroke's defeat in his final battle comes down to this. The man with the 90% of Your Brain powers opts to perform a very telegraphed, charging stab at Damian, who is standing right in front of a container with boiling Lazarus compound, despite the fact that Damian can easily jump away.
YMMV / Son of Batman