Cameron Crowe's "The Union," which chronicles the Elton John/Leon Russell collaboration that bore an album of the same name, will debut on HBO in January 2012, the cable outlet announced Monday. Related Articles:? Cameron Crowe Doc on Elton John to Debut at Tribeca -- With Elton on Keyboards Elton John Invades 'American Idol,' 'SNL' Promo [Video] read more