I can swear some of the banners are ASOIAF-Inspired:
At Swadian Banners,the 2nd banner first row has 3 dogs like House Clegane,though not of the same colour and the 3rd banner last row has a golden lion on a crimson shield on a field of green and white.Reminds me of Lannister.
At Vaegir Banners:2nd banner 2nd row is a golden seahorse on a field of white with a blue sea under him.Reminds me of Velaryon.
Nord banners:1st banner 2nd row has a red griffin head on white and a white griffin head on red with stripes in the upper and lower parts.House Connington has full griffins and no stripes.
At Rhodok Banners 3rd and 4th of the first row remind me of Grafton and Westerling.
Companion Banners very first banner is Renly's new personal Coat of Arms from the Tv Series 2nd season just remove the stripes at the upper and lower parts.
At Player Banners:
1st pic,2nd row,1st banner is a black dragon on the field of red and white.If the dragon had 3 heads and the lower part red:BLACKFYRE.
This pic:
2nd row 2nd banner is completely Clegane.2nd row 6th banner is nealry Targaryen,but for 3 heads of the Dragon.
Not to mention that many of the banners emblem designs are same with those used at www.westeros.org or awoiaf.westeros.org. I.E the 2 last banners at Companion Banners 1st row are respectively the Connington Griffin design and the Prester Bull design.