Sorry but no, as it stands there is normally no way of knowing ahead of time what games are coming down the line. There are a few occasions where they tell us such as 7th guest, 11th hour, Machinarium, Spacechem, Legend of grimrock, Darwina, and Botnicalua but those are few and far between. They probably do this because they normally don't know exactly when a game is going to see release as the games normally go through Q&A testing, tweaking, and then making sure any issues with the rights to the game are all settled, so they don't know for certain when exactly most of their releases are going to be available so they don't tell us till they do know, which is usually release day.