Here's how it looks in my head:
Jean-Marc Mormeck is the acknowledged boss at cruiserweight (200 lbs.), the division just south of heavyweight. He is, more or less, a human battering ram. A French one. He splashed onto the scene in the United States when he toppled well-regarded Wayne Braithewaite in a rare unification fight by stalking him and hitting him until he couldn't take it anymore. Before that, he had quality wins over top-flight cruiserweights Dale Brown and Virgil Hill. When I saw him against Braithwaite, I thought, "I don't know how you beat a guy like that. He just keeps coming and doesn't care if you hit him." It was an appealing style, since most boxing fans want to see a lot of leather traded. Turns out the way you beat him is to push him off you and keep him at a distance with power shots, which is what O'Neil Bell did to him in 2006 in a fight of the year candidate that had numerous potential rounds of the year within. Bell stood up to the blows Mormeck landed then knocked him out late, but in a rematch, Mormeck overcame exhaustion and some moments where he was stunned to win a decision.
Brit David Haye is less of a grinder, but he brims with natural talent. He's knocked out 16 of his 17 victims. He's got a lot of speed, the thing he thinks will make him stand out when he makes a permanent move to heavyweight. When he hits people, it's like he erases them. He's young and fresh, but he's also been knocked out himself. But I've run into a problem here: I can't say much about Haye's experience, because he hardly has any major victories on his record. When your "best career win" is against a fighter who was 37 and had defeated no one of note and didn't turn pro until he was 31, I'm not terribly impressed. Knocking out someone in the first round in your heavyweight debut who'd lasted nine rounds against a more established heavyweight three years earlier is kind of neat, but again, it doesn't prove all that much much. That Haye fought at heavyweight earlier this year and had to shrink nearly 30 pounds to get back down to cruiser will resurrect long-held questions about Haye's stamina, although Haye says he's slowly shed the pounds over a five-month period.
That said, Haye's a dangerous man for Mormeck. Mormeck's 35. Haye is 27. Haye is hittable, but he could ably mimic Bell's successful formula of power + distance = Mormeck sleepytime. Mormeck can fight from a distance if he has to, but he's clearly more comfortable fighting on the inside, and he's going to have to walk through some big shots by Haye to do so. The briefest of contemplations of this dynamic reveals its inherent potential for drama. But since it's up against one of the two or three biggest fights of the year -- Miguel Cotto-Shane Mosley is also Saturday -- I suppose it would have been hard for a U.S. station to counter-program. I beg of someone to put this Mormeck-Haye thing on YouTube when it ends.
My prediction: Mormeck by late-round KO. Mormeck doesn't overwhelm people with one-punch power, but he does put a hurt on them over time. He's way more experienced than Haye, which I think will work to his advantage rather than his detriment. And it's unsettling the way Haye struggles to make weight and fantasizes about moving up to heavyweight. I think even if he's made the cruiserweight limit easier this time around, it's still a struggle and he doesn't much want to make weight anymore, which means he may be distracted and tired.
Confidence: 70%. No, I wouldn't be remotely surprised if Haye caught Mormeck with something big early and finished him off quickly. I just think it's significantly more likely that Mormeck's experience beats Haye's youthful assets and vulnerabilities.
My allegiance: Mormeck. What's not to like about a really good French fighter? Die, stereotypes.

Who said the French can't fight?