What if the Black Hood is Betty's long lost brother?!
Betty has green eyes,so does her mother and the black hood too.
He might want revenge because they abounded him.
Also what if it's not Betty's Dad son what if it's FP's son since this happened all when Betty's mom was a teenager and we recently found out that she was a south side serpent when she was a teenager.
FP and Alice have defiant history in the past because in some scenes like at the dinner table he knew about the fight between Alice + Hal about the baby maybe they were arguing cause it wasn't Hal's baby but FP's!
Another thing is that Alice first got pregnant when she was young (still in school) so this means her son is obviously older than Betty.
That's my theory ❤️