Is there any info whether FFG plan to make expansions to GoT 2nd edition?

The 2nd Edition came out not too long ago. I highly doubt you will find any official information from FFG on possible expansions at this time.

It's FFG. Nuff said?

Seriously though, I wouldn't be surprised if they did. The 1st Edition Storm of Swords was an amazing expansion, and most of the elements that made it so strong were not worked into the 2nd edition. But for now, it's still a bit early--give it awhile.