The novel adapted by God of War's son-in-law, Jack, was a classic Wuxia novel by the author, Period. It told the story of Ye Cheng, who was an unremarkable nobody five years ago, but became a legendary God of War after returning from his training. The plot of the novel was full of ups and downs, and it was still being published. However, the search results did not provide any specific information about the adaptation of the novel and whether it had been adapted into a movie or television series.
Yes, there are likely fanfictions out there with such a premise. Fanfiction writers often come up with creative and unexpected relationships between different fictional characters. They might explore how Danny Phantom's powers and his character would be affected by being Jack Frost's son, and could create really interesting storylines that combine the elements from both universes.
In fanfiction, anything can be possible. But in the official Harry Potter and Pirates of the Caribbean universes, there's no such connection. Fanfiction often takes characters from different stories and creates unique and sometimes out - of - the - box relationships. However, this is purely a creative and fictional idea within the realm of fan - created stories.
I'm not sure specifically which story about Jack Black's mom is being referred to. There isn't a lot of widely public information about her in a single, well - known story. Maybe she was a normal mom who supported Jack Black in his acting career from the start, like many moms do, by encouraging his creativity and being there for him during auditions and rejections.