I decided to put this here instead of in the main ECM thread because I'm guessing the interest will be more general - but in January, ECM will be releasing a 2013 live recording of a quintet with Jack, Muhal Richard Abrams, Roscoe Mitchell, Henry Threadgill and Richard Larry Gray as a 50th anniversary tribute to the AACM (with compositions by Jack, Muhal, Roscoe, Henry as well as some collective improv). It's live so some of Manfred Eicher's more controversial production choices should be less less disruptive, I'm guessing.