Have you seen pictures of his kids? I have my doubts that he's the biological father. I mean, its one thing for a multiracial child to be fair-skinned, but Paris Jackson has blue eyes. It isn't impossible for a child with an African-American parent to be blue-eyed, given that most African-Americans have a degree of distant white ancestry, but its very unlikely.
I wouldn't want to see them raised by their biological mother or by their grandparents, personally. Hopefully they end up in the custody of one of their uncles, most of MJ's brothers seem to have their heads on straight.