Slade Wilson had previously taken an intense interest in Damian Wayne, leader of the Teen Titans. Disagreeing with Batman's mentoring of the young boy, Deathstroke came into conflict with the Dynamic Duo on several occasions — throughout these encounters, he would try to turn Damian to his way of thinking, encouraging Damian's darker tendencies. He would wind up locked in Arkham Asylum for his troubles.
In the meantime, Damian Wayne had been locking up supervillains beneath the Teen Titans' base of operations without trial. He kept this a secret from his team, other than Emiko Queen.
Now, Slade Wilson has escaped, having killed a group of homeless people. Slade says they were evil aliens in disguise, but all evidence says he is wrong. As a result, Damian has organised his new team of Teen Titans to hunt down the infamous mercenary.
The Terminus Agenda has examples of:
- Anguished Declaration of Love: Crush to Djinn, who was already kind of in a relationship with Damian.
- Asshole Victim: Slade Wilson when he's killed. The guy is a complete asshole and has been presented as such even in his own series, with his only redeeming quality being his love for his children, and even that has been presented as misguided, toxic and harmful to them.
- Batman Gambit: Slade pulls this off in the end. He releases Damian's prisoners, not because he thinks they'll actually do anything worth a damn, but because he knows Damian will make the Teen Titans catch them and thus reveal his secret, due to the eponymous Terminus Agenda; once the villains get a certain distance from the base, they will be killed.
- Boom, Headshot!: How Deathstroke bites it in the end; Emiko shoots him in his bad eye with an arrow.
- Disproportionate Retribution: Damian's actions against Deathstroke, which Wallace asserts are because Slade ruffled his hair once.
- Due to the Dead: Slade is given a funeral, attended by supervillains. Some are very respectful, particularly Red Lion and Doctor Light. Others are far less so and literally spit on the grave.
- Evil Mentor: Slade attempts to be this for Damian, but by this point it doesn't take.
- Mythology Gag: When Slade goes to the barber, he greets two acquaintances, Marv and George, clearly named after Marv Wolfman and George Perez.
- Secret Keeper: Wallace finds out about the supervillain prison and keeps it a secret while he works out what to do with the information.
- Ship Sinking: The events of the story effectively destroy Damian's relationship with Djinn.
- Unreliable Narrator: At one point, Black Mask says that Slade was a war hero until Grant Wilson was killed, which started him on his villainous path. Roman is very clearly warping things, as Slade was already a terrible person before Grant died; his own series instead paints him as becoming deeply affected by his service, which in turn led him to gaining superpowers and this is when he started being horrible towards his family and the world.
- Villain Takes an Interest: Slade makes his last play at mentoring Damian. It doesn't take.
- What the Hell, Hero?:
- Damian and Emiko are called out for keeping their supervillain prison. Wallace is also called out by extension for not telling the rest of the group, though he had only just found out and the group is more forgiving of him than the other two.
- Emiko, for killing Slade.
- Wallace is called out for calling Emiko out, as while she killed Slade, both Emiko and Jericho, at separate intervals, call him out for not catching the arrow, implying he let Slade die. Whether or not he did is not addressed.
- Your Mom: Slade insults Emiko by implying he slept with Shado. It's not actually clear whether or not he's lying.