User blog comment:Neilandio/Is it safe to say this is a Snow Wraith?/@comment-24990845-20150414111625/@comment-4607952-20150417104742

I highly doubt that someone at Ludia designs the dragons, most likely they get sketches or models from Dreamworks and then adapt them for the game. Some of the dragons introduced in Rise of Berk have appeared in School of Dragons.

As for dragons from Rise of Berk appearing in the TV series there is a possibility:

The producers said that there may be a few dragons from the Rise of Berk game that end up in the show too.

http://nokki1.tumblr.com/post/115633796813/so-let-me-just-tell-you-guys-a-little-about-what