I don't think that there's any real chance of him showing up. Big-name creationists have got extremely wary of showing up in online forums, especially ones which don't have a sympathetic management. The last example I know of in an even slightly open forum is Jonathan Sarfati's appearance on Theology Web - and even then he had the forum moderators protecting his anonymity (or attempting to) by banning any reference to his true identity.
And for all you know he might be more likely to show up to refute CMI's accusations than if we simply kept at him. Not that there's much chance either way.