There was a banner on the Valve site a few years ago saying "watch out for the forthcoming remix of Hard Noize by Break" or something along those lines, but nothing ever came of it afaik
There's still a DJ competition banner on the Valve site saying entries must be in by Feb 2014. I think we're pretty safe not expecting anything from Valve to be honest.
even tho he's done some questionable stuff there's no way Time For You/Play Away can be his last release. his career and legacy should not be allowed to end on those 2 pieces of watered down pish