My gut is telling me that a win against Nelson does nothing for his cred or putting anywhere near a title shot. A lose to Roy would severally hurt his cred. Also if he is French he might be worried about visa issues no sense taking a fight you might not be able to get into the US for. I know at best he is HW gate keeper but looking at it from his perspective.
Eh I dunno. Roy would be the best win of his career unless I'm forgetting something. Roy is in the level between the guys Kongo beats and the guys Kongo loses to. Which IMO puts them on about the same level.