Weird Game of Thrones Predictions **possible spoilers**

I was at a party today and everyone began discussing GOT and one guy had some strange predictions that do seem to make sense. I'm wondering if he actually came up with these or if he read them online somewhere.

He suggested that Bran is actually the Night King. He said if you go back and watch earlier seasons, the Night King kinda looks like Bran. He thinks Bran went back in time and got stuck. He said the reason the Night King didn't kill Jon earlier is b/c he recognized him as his brother.

Another prediction he had is that Tyrion is a Targaryen. He offered the fact that Tyrion's dad said "you're not my son" when he killed him as actual literal proof. He also said that Jon's mom died during childbirth as did Dany and Tyrion's mother's as some sort of proof that they're all linked. He says the 3 dragons represent the three of them.
I was a little buzzed at the time so he made more sense then, but they are interesting theories that I've never come across