I’ve got no idea either I’m afraid, with such a vague horn & String introduction it could be anything, it may even have been made by Howlett himself…
Search Batman, Superman, any Sci-Fi film from 1990-1999, Battle of The Planets etc etc, any grandiose movie about the bigger picture and you should pick up a few stringy-horny intro samples.
Failing that, nick the opening bars to ‘Slam’ by Pendulum!
D