The track on the Venom score is entitled “Unexpected Ally” and could very well point to the relationship between the Venom symbiote and Eddie Brock, but the promotional material for the movie makes it seem like they come to an agreement fairly early on in the film.
While the tracklist for the original Venom score has been revealed, the Venom soundtrack album has yet to be announced, save for the Eminem track, which was recently released.
As for the beginning of the movie, it seems that Venom will show how the symbiote makes its way to Earth from space.
You can check out the tracklisting for the Venom score below, thanks to Film Music Reporter.