http://www.pcgamer.com/gwents-single-player-thronebreaker-campaign-has-been-delayed-into-2018/

The Gwent single-player campaign Thronebreaker, which had been slated to come out by the end of the year, has been delayed into 2018. Developer CD Projekt Red said in a "development roadmap update" that it has decided to "increase the campaign's scope," and so it's going to need more time to work on it. 

"Shifting release windows is always something we approach seriously, however, we’ll never hesitate to do it if we feel you’ll get a better game as a result," CDPR co-founder Marcin Iwiński said. "I would like to apologize everyone who planned to play Thronebreaker over the Holidays—I assure you that we will do our best to make the final game worth the additional wait."