I guess if I was a fan of GOT I would have enjoyed this more. I mostly didn't care for this because I didn't really understand it. I do understand if you are a big fan of the series. I thought I knew enough about tropes to be familar with anything? Well, the animation was as good as ever. I especially like the one shown in the last scene.
There's always theories to a characters being someone's father or that guy in the future. I will say it was funny to make jokes about buckets of nipples. It's just an image that's so insane it comes off as entertaining. I don't know if they're speaking a real language. Of course, all languages are technically made up.