Sir Paul McCartney is expected to release the theme song for Destiny as a single soon after the game's release in September, according to a representative for a Hollywood production firm.
The track has been kept secret, though according to a New York Times article, it is fully orchestrated and recorded at Abbey Road with a 120-piece ensemble directed by Giles Martin. Its producer is Mark Stent, who has worked with the likes of Madonna, Bjork, Lady Gaga and U2.
Destiny's theme song is said to be about hope, though little else is known about it.
Sir Paul's involvement on Activision's major cross-gen title is a testament to both the lavish production costs of what is hoped will be a prosperous long-term franchise for the company.
Legal documents, leaked in 2010, suggest that Activision has a plan to release one Destiny game each year. Originally the plan was to launch the first Destiny game in 2013, with the next three games projected to arrive 2015, 2017 and 2019. Then, four "Comet" expansions were scheduled to launch in 2014, 2016, 2018 and 2020.
Though Bungie appears to be a year behind schedule overall, there's no indication that Activision's wider plans for the series have changed. Activision chief executive, Bobby Kotick, was quoted as claiming that $500 million had been set aside for Destiny's development, though it was later revealed that Kotick misspoke and the budget for the first game was "not anything close" to this.
In July, Bungie community manager David Dague said the studio "must earn the right to put a number on the box" - a reminder that its debut sales will be crucial in determining future support for the game.
Yet interest in the title appears to be intense - its Beta, released on Xboxes and PlayStations across July, had attracted some 4.6 million players.
Sir Paul is believed to have be working with composer Marty O'Donnell for two years on Destiny's score, meeting occasionally at the famous Abbey Road Studios in London, as well as other studios in New York and Los Angeles.
Destiny is not the only game Sir Paul has been involved in, having given his voice and likeness to EA's 2009 hit, The Beatles: Rock Band.