Is it still on PJ's website? No comment... people there should work harder for their pay.
Every week someone asks on Facebook about this concert, then others answer "I phoned/e-mailed etc. them, and no, there will be no concert in Bilbao."
It's not on the site of Parnassus ARTS Production, neither that of Concerto Köln. So I think we can believe it won't happen.