moviedoors,
Well, I haven't gotten that far yet but even still, as weakly as it is in the film, at least there's a reason for Hector to be there. 62 pages in and there's no reason whatsoever for Hector to be there. NONE.
Had the film worked out the situation between Hal, Carol, and Hector, the film would've been fine. What the film weakly did was try to have a juxtaposition between Hal's relationship with his father and Hector with his, with Carol caught in the middle.
The film shows how both characters respond to having power thrust upon them. Their connection SHOULD been how they related to their fathers. They didn't map it very well in the film, but that's what it was going for.