Doc News: Elton John; “Big River Man”; DocPoint NYC

– HBO Documentary Films has picked up Cameron Crowe’s “The Union,” which documents the collaboration of Elton John and Leon Russell, which does make it sound like an advertisement at worst, a making of film for an album at best. Having made its debut at the Tribeca Film Festival last month, the cable outlet will give the rock doc its TV premiere in January 2012. Crowe, who was a music journalist before becoming a filmmaker,¬†finally dove into documentary this year with a double dose. His other new rock doc, “Pearl Jam Twenty,” arrives to fans-only delight this fall.

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