It was composed by Leonard Bernstein with lyrics by Stephen Sondheim and is sung solo by the male lead character and tenor 'Tony'.
"something’s coming," Laurents had written: "it may be around the corner, whistling down the river, twitching at the dance – who knows?"
"I’ve never seen anyone so encouraging, let alone generous, urging us, ‘Yes, take it, take it, make it a song.’""[1] Bernstein reported on the last minute change thus: .
It’s really going to save his character – a driving 2/4 in the great tradition (but of course fucked up by me with 3/4s and whatnot) – but it gives Tony balls – so that he doesn’t emerge as just a euphoric dreamer.
It also explains "'Something's Coming' does not follow a standard song structure such as verse and chorus.
[9] AllMusic wrote of the Oscar Peterson Trio jazz version of the song "Something's Coming seems like a series of vignettes, constantly shifting its mood, as if moving from one scene to the next.