I think in the court case itself there will be little talk of his upbringing. ?Had a weird childhood? isn't the sort of thing a defence lawyer wants to be blurting out in a child abuse case and I don't think the prosecution will bring it up as it will have very little relevance to their case being at best superstition.
The media on the other hand may well pick up on JW paedophile cases and tie them into the case. If Jackson is found guilty then we can expect months maybe years of speculation in which his childhood and the JWs will predominantly feature.