The Scorpion King is a prototype for a fighting game / beat ‘em up that was created by Osiris Studios, based on the 2002 film with the same name (featuring Dwayne Johnson). It seems that the studio tried to pitch this demo to publishers that had the Scorpion King license (probably VU Games in North American and Universal Interactive in Europe), to get to develope it into a full game, but without luck.
In the end the publishers chose Point of View to work on their Scorpion King videogame, released in 2002 as The Scorpion King: Rise of the Akkadian for the Playstation 2 and GameCube.
The Scorpion King demo by Osiris remained just a prototype and the studio closed sometime later (or did they evolved into an audio restoration agency?).
Thanks to Tork for the contribution!