Royce mentioned this himself on the underground boards. I guess it's also on Pride's japanese site. It's taking place on December 31st. I guess it's not going to be PPV'ed in the US. I haven't seen anything official on the rules, but I've *read* that it's going to be full pride rules, with both wearin gi's. (I'd imagine without the judges decisions, though.)
My prediction: Royce complaining.