Jack Black is not getting the band back together ... telling us Tenacious D still isn't reuniting for a new project despite reports to the contrary. We caught up with the voice of Bowser himself in New York City Thursday afternoon ... and we asked him when we can expect to see TD pumping out new projects. JB says he and Kyle Gass have no plans to work on anything new ... so, put your 'Picks of Destiny' down, fans -- there's nothing to strum along to. We seem to be getting mixed messages from