O artigo da Wikipédia para Highlander: Endgame tem uma resposta, ainda que insatisfatória. Ênfase adicionada:
The trailers for the film feature several shots showing Kell using mystical abilities (such as stopping a sword in midair with some sort of force field, cloning himself and holding an orb with Connor's screaming head inside of it). Also, Connor and Duncan are shown emerging from some sort of portal. None of this footage made it into any released version of the film, and the footage is only seen in the trailer. No explanation for the nature of these scenes has ever been willingly released by the producers or film studio, although it has since been revealed that these shots were never intended for inclusion in any finished cut of the movie — they were shot exclusively for its trailer, instead. No mention of Kell's magical abilities exists in the online version of an early screenplay.