Time Out New York has a short interview with Karl:

So your NYC date will be a surefire winner?
[Laughs] Of course! But really, already we’ve tested out the new show with a few shows around the world, and we’ve already been touring with it in the U.K. But one thing that’s constant with Underworld is that everything is constantly changing. Rick, at the moment, is in the studio working on altered versions of all the tunes.

Read the full interview here.