IGN claims that "multiple inside sources" leaked to the site that Telltale Games is working on an episodic adventure game series based on George R.R. Martin's Game of Thrones book series.
This would jive with Telltale CEO Dan Connors stating back in October that the studio was working on what he called the company's "dream IP scenario", and that he couldn't wait to reveal the new games.
Game of Thrones is a hot videogame project at the moment, too, with a browser-based MMO based on the books called Game of Thrones: Seven Kingdoms in works, as well as an Atlus-produced RPG and a strategy title, Game of Thrones: Genesis, being published by Focus Home Interactive, which also released an RPG back in 2012 (as seen in the image above.)
Telltale has already recently done games based on Back to the Future, Jurassic Park, Fables, and, of course, The Walking Dead.