A Spin-Off/Prequel to The Mummy Trilogy.It's the year 5000 BC - or thereabouts. The anachronistic Greek general Memnon is out to, you guessed it, take over the world. Which consists of African tribesmen, Amazons and the City of Gomorrah in improbably close conjunction. The leaders of the Free Peoples, including the chiefs of the aforesaid Africans and Amazons, hire the 'last of the Akkadians' a race of deadly assassins, (which would come as a surprise to Sargon of Akkadia) to kill not Memnon, but the evil sorcerer whose magic and prophecies are the ultimate source of his success.
This film provides examples of:
Action Girl: The sorceress, despite clearly not being an actual trained fighter, still isn't afraid to pick up a sword and either defend herself or others... and isn't bad at it for an amateur, either.
Artistic License - Biology: The poisoned arrow Matthias was stabbed with would not have been much of a threat (well, aside from the whole getting stabbed thing), since the type of scorpion the venom was taken from, an emperor scorpion, chosen because they are huge and look creepy, is actually only slightly more dangerous to something the size of a human than a bee. With scorpions, the bigger they are, the less dangerous their venom, since they will use their claws to kill prey and their size to frighten off predators. Mathayus would have been in much greater danger from dying from blood loss or infection than from the venom.
Artistic License - History: So apparently Viking warriors are well known for having blood feuds with assassins from Akkadia before the pyramids were built. Also, Greek warlords apparently regularly commandeer what appears to be Babylonian warriors so they can base their capital cities in modern day Iraq. Also, those iron swords sure look nice in 5000 BC.
If it was 5000 BC; The Mummy Returns tells us that the Scorpion King lived around 3000 BC, and archeology informs us that King Scorpion (Surprise! Yep, there really was such a guy) preceded Menes, the first Pharaoh of united Egypt, around 3100 BC.
Memnon was the name of an Egyptian king, not... wherever Memnon was supposed to be from.
Good thing no one remembered that magic black powder or how effective it was.
Artistic License - Physics: If the first five minutes of The Scorpion King do not have you in tears of laughter, you have no sense of humor. To clarify, Mathayus shoots three mooks (at the same time) with three arrows shot (at the same time) from his bow. The center mook is sent flying, flipping head over heels for at least 15 meters, smashes through the wall, and KEEPS flying for another 10 meters. Though, they did manage to make it out so that it takes a really strong guy to string a really strong bow to shoot really strong arrows.
Asskicking Equals Authority: It is mentioned early on by the narrator that the reason Memnon is the king of his empire is because he is the army's most skilled warrior. After Mathayus defeats and kills Memnon in the climax, he is automatically hailed as the new king.
Battle Amongst the Flames: One hopes Memnon has fire insurance. But it wouldn't help. He was the one who set his palace on fire. They'd figure he was just trying to get the money by torching his place.
Godiva Hair: The sorceress of course, when Mathayus surprises her in her bath.
Happily Ever Before: The only hint of the events that happen to the main character in The Mummy Returns is the sorceress saying "Nothing lasts forever." Other than that, the ending is pretty cheery. Stephen Sommers, the writer and director of The Mummy Returns has said that he considers the Scorpion King in his film to be an Identical Grandson of Mathayus, who Sommers felt was too heroic to turn into the bloodthirsty character seen in The Mummy Returns.
Kick the Dog: Memnon, constantly. Between that and the massive clutching of the Villain Ball, he's quite the quintessential action movie overlord.
Last of His Kind: Mathayus again. The Akkadians are apparently wonderful assassins, but very bad at self preservation.
Large Ham: Billy Zane in Scorpion King 3: Battle For Redemption does what he does best and makes the whole experience very enjoyable.
Let's You and Him Fight: Balthazar is needlessly antagonistic to people who are on his side - even taking into account that he doesn't trust Mathayus. So, naturally, he and Mathayus end up fighting in a situation that probably could've been easily avoided.
Russian Roulette: A variation. Memnon puts six pots on a rotating table, loads poisonous snakes into four of them, places lids on the jars, and then spins the table. He does so to make sure the sorceress still has her powers. She guesses right the first time, changes her mind on the second and instead uses her powers to get the snake to attack him.
Samus Is a Girl: Memnon's sorcerer (assumed to be male before The Reveal) is actually a sorceress. In the Latin American dub, they made it look like it was an old lady.
Screw Destiny: The sorceress tells Matthias that he's destined to fall at the hands of Memnon. He just tells her he'll make his own destiny, thank you very much.
Sequel: Believe it or not, The Scorpion King 3 is actually the proper sequel to The Scorpion King (while the Scorpion King 2 was its prequel).
Serial Escalation: Mathayus shoots three guys with arrows from his bow (fired all at once, of course). Not only do all three go flying, one actually hurtles backwards, smashes through the roof, and keeps going on an upward trajectory until he's out of frame. And that's in the first two minutes of the movie.
You Said You Would Let Them Go: Averted: Mathayus gives his word that he won't kill Horse-Thief and will obey his commands in exchange for Horse-Thief saving him from ants (it makes sense in context). Afterwards, Mathayus uses the camel and essentially forces Horse-Thief to walk, causing him to protest that they had a deal, and Mathayus tells him that he's upholding the deal, as he is not going to kill him... at least, he won't kill him yet.