A Prologue (Instrumental) is included in "Tomorrowland Soundtrack". All instrumental themes in this collection are short: there are those that last less than 1 minute, and some may be around 3. But some are long, like 6 or 7 minutes. Composer Michael Giacchino tried his best to create such magnificent melodies, like this one, that have charmed our ears and, at the same time, would bring a sense of calm grandeur.
Reference:'Tomorrowland' Soundtrack and Complete List of Songs