10-Minute Retirement: Zack quits Team Baron and spends some time living in New York early in the film, although this does not last long.
Action Prologue: The film opens with Archive Footage of Zack's assassination attempt and brief clips of his and Kaito's last fight in Episode 45 before cutting to new footage.
Ambiguous Situation: It's unclear in the ending as to whether or not Zack survived his battle with Shura, as he speaks to Kaito's ghost. However, a novel set later in the continuity confirms his survival.
Attack Its Weak Point: Zack's leg injury from the end of the series still causes him pain even a year later, and Shura deliberately aims for his bad leg when they fight.
Battle Strip: Both Zack and his opponent in the fight club fight go shirtless in their fight.
Big Damn Heroes: A twofer when Zack (who has just barely managed to win a difficult brawl and has not yet recovered from the effort) is confronted with five of Shura's fighters. Oren steps in to fight them in his stead while Jounouchi helps the exhausted Zack escape the club. And when they are chased by two more thugs who turn out to have Sengoku Drivers, Mitsuzane shows up as Ryugen to fight them off.
Black Knight: As his name suggests, Black Baron is essentially the Kamen Rider Baron suit only colored black. Making him a stark contrast to the real Kamen Rider Baron.
Cult: Neo Baron is basically one around Shura's twisted interpretation of Kaito's ideals. He also has connections to an actual cult, the Black Bodhi Tree.
Dirty Coward: Shura attacks Kaito from behind, sets a couple of goons on Zack when he realises he's losing, and deliberately target's Zack's bad leg in their one-on-one fight. Zack explicitly points out that this, rather than being weak, is why Shura was kicked out of Team Baron.
Evil Knockoff: As the name makes clear, Black Baron is the Baron suit with black instead of red, fitting symbolism for how Shura is perverting Kaito's ideals.
Fashionable Asymmetry: Black Baron, as with Kaito's Baron armor, has one shoulder pad larger than the other.
From Nobody to Nightmare: Shura went from a Dirty Coward in a breakdancing team to a brutal gang leader of a fight club with desires to exterminate potentially hundreds of thousands of people.
Heroic RRoD: Zack collapses and passes out after he finally beats Shura.
Hijacked by Ganon: There are a couple of hints that Kugai might be influencing Shura. Aside from explicitly naming the hypothetical recreated Scalar System as the Saver System, the credits of the previous Gaiden show that Shura got his Lockseed from Kugai, and he's seen handing out a Zakuro Lockseed to the winner of a fight as proof of Neo Baron membership. And he's explicitly stated to have connections to the Black Bodhi Tree.
I Choose to Stay: Zack thinks Peco is being held captive by Shura, and agrees to fight a match in Shura's fight club for Peco's freedom. He's stunned, however, when Peco refuses to leave with him.
I Have Your Wife: Shura takes Azami prisoner to lure Zack into another confrontation with him.
Meaningful Name: Aside from referencing the Paint It Black treatment, Black Baron is a reference to a fighter ace, like how Kaito's red-colored Baron suit was a reference to the Red Baron.
Misaimed Fandom: In-Universe, big time. Shura idolizes Kaito and the idea of strength, and carries out a standard Social Darwinist routine as a result. As Zack points out, Shura doesn't understand Kaito at all, because Kaito despised the fact that the world itself was a Social Darwinist and sought power to change that.
Oh, Crap!: Zack and Jounouchi when the thugs who have them cornered suddenly pull out Sengoku Drivers.
Paint It Black: Shura's version of the Baron suit has a black undersuit instead of red.
Remember the New Guy?: This film introduces Azami and Shura, two characters that were part of Team Baron's early beginnings (and the former being Peco's sister who is also very close with Zack) but were never mentioned in the original series.
Shipper on Deck: Peco, averting My Sister Is Off-Limits, seems to approve of a possible relationship between Azami and Zack, given the smile on his face as he hastily leaves the room to give them some time alone.
Social Darwinist: Shura believes in strength above all. And he's planning to wipe out the weak.
Stealth Pun: Just like how Kaito's use of the Banana Lockseed could be used to set up puns about him playing "second banana" to Gaim, Shura could be said to be a "rotten banana".
Time Skip: A few, primarily the one between Zack waking up in the hospital, occurring in the Time Skip in the middle of Episode 46, and him leaving Team Baron 1 year later.
Transformation Trinket: Shura's Banana Lockseed, which is notable in that while it functions more or less identically to Kaito's, it has no Lockseed number (i.e. the space that normally says L.S.-08 is completely blank).
The Unreveal: The movie doesn't reveal where Micchy got a new Driver and Lockseeds for Zack, although a likely explanation is that they were created by the less-villainous remnants of Yggdrasil.
You Are in Command Now: When Zack moves to New York, he leaves Peco in charge of Team Baron. It sadly doesn't go well...
