I don't think Hopkins is "scared" of Roy, but I do believe he thinks there's a huge chance that he will lose to him again. Styles make fights, and I just don't see how the version of Roy that fought Lacy (the one that actually throws punches) can lose to Hopkins. Hopkins has trouble with fighters with speed as he is a more control the tempo, laid back fighter, especially if that speed comes with any kind of power behind it. Just see the Taylor fights- about the only guy with speed and decent power he's fought lately and lost both of them, and we've seen how "great" a fighter Taylor turned out to be. Now, if the non-punching version of Jones that appeared in the Johnson, 3rd Tarver and Calzaghe fights appear, Hopkins beats him up no doubt.
My feeling is that the only way Hopkins can beat Jones is if he lands one big shot and KOs him but when's the last time Hopkins has KOed someone with one punch? A fat De La Hoya? And that was with a body shot. He beat the hell out of Pavlik, but if I recall, Pavlik never went down. As we saw from the Taylor fights, it doesn't take a lot to knock him down; keep him down, maybe, but not knock him down.
So I just don't see Hopkins out-working Jones and/or KOing him with one punch. Even in rounds that Hopkins may have a higher punch total, Jones is so much flashier than Hopkins that Jones would probably steal some. But this is my opinion and is strictly based on Roy Jones letting his hands go.
On another note, for people saying "Why should Hopkins fight Roy, what does Roy have to offer": Well, aside from the $$ it would generate, whatever happened to just wanting to beat the guy that beat you? You would think that a guy who talks about another man being "scared to stand up to someone" would be the first to say, "listen, Roy, I'm a better fighter than you now and you beat me when I was just coming up, so I'm going to accept 60-winner and 40-loser just so I can kick your ass." I'm tired of all this "well, I beat Jim, who beat Joe, who beat you so I'm better" bullshit. In football, if my team loses to team A, but I beat team B who beat team A, I don't talk trash to team A fans because they'd say "so what, we beat you." Say what you want about Roy, but he has the W over Hopkins in a fight that wasn't really that close to even warrant a rematch until many years later.
As entertaining as this radio show was, sadly, we'll more-than-likely never see this fight happen. I wish Hopkins had as much faith in himself that he could easily beat this shell of a Roy Jones that his fans have- if he did, this fight would be happening this year.