I think I heard this theme somewhere before, but I finally found it within a recent documentary I watched on Pyramids. Sound sources indicate music composer Laurent Juillet (who I sent an email message to) but he is credited only for additional music. The end credits show Sound Voyager and Kosinus for the Music. I don't know what Sound Voyager is, can't find anything on Google, but Kosinus is a famous company that does library music, like Immediate Music, etc. There is a website on Kosinus Catalog - APM Music (http://www.apmmusic.com/kosinus/kosinus-catalog) but the catalog is just too huge to go through each track... they have tons of music. Anyway, the track I am looking for can be heard in the background of this video, but this video is not a trailer, it is how the documentary actually begins:
Kh�ops R�v�l� on Vimeo (http://vimeo.com/10041325) (listen to the background music). I quickly edited out the male vocal so you can hear more clearly the theme here: Playing: 17143035.mp3 - picosong (http://picosong.com/kzSE/)

My initial reaction was Assassin Creed type of music, but there is no way Jesper Kyd worked on that...

Please, let me know what that is <3
Thanks!!!