http://uk.ign.com/articles/2014/02/25/beneath-a-steel-sky-2-not-in-development-after-all
looks like we might have to wait a while for a number 2, really loved this game

Makes sense as they have already angered many people with the delays of Broken Sword 5*, so focusing to BaSS2 now would be a PR disaster. I hope that it's their next game though.

*Personally I'm not angry, but I'm eager to see how that story ends.