It depends on whether youre talking about liberal theology itself, or the particular liberal churches...

Liberal theology itself is simply the reaction of protestantism to higher criticism -- when you read the earliest liberals, this is what its all about: that scripture was not written by the great men who tradition says, and that its authors are backwards savages compared to modern men.

It will inevitably dissolve into secularism, although i wouldnt say thats what its founders intended... the whole movement is pretty close to this point now.

The particular churches all have their own little agendas, but they're irrelevant -- liberal christianity will be dead in a few decades. They have terminal demography and cannot recover.