Years ago, there was a Babylon 5 CCG. And for those who loved the TV show, there's a really good depth of factional strategies in it. I think a lot of the mechanics can be very similar to the A Game of Thrones LCG, so adapting or re-adapting the old Babylon 5 CCG mechanics may be a pretty easy process.
For those who are not familiar with Babylon 5, it's a sci-fi TV show that had 5 (?) seasons. Relatively short, compared to others, but the storyline was solid.