"You get to understand the relentlessness that Boba has," McCallum says. "Here, and especially in 'Episode III,' you’ll understand why he’s so obsessed with destroying any part of the Skywalker family."
This puts to the test McCallum's notion that he knew what was going to be in Episode III many years in advance. If he didn't even know the broad outlines of the plot (or, hell, Boba Fett's motivation in ESB), there's no way he knew specifics like the dialog on Mustafar. His reading of Episode II is pretty senseless, too. Why would Boba Fett hate the Skywalker family? Obi-Wan ruined the nice little home they had on Kamino. Yoda led the attack on Geonosis. Mace Windu killed his dad. Does this guy not think before he speaks, or is he just some actor hired to be the public face of Lucasfilm?
I'm calling shenanigans on you, Rick McCallum. George Lucas is still playing Independent Filmmaker with a Vision, and maybe that's what he still is, but you're Hollywood all the way. You're a liar and a profitteer. Get lost and let someone who cares about the franchise run things.