The following report contains a big Episode II spoiler. While it's nothing new to long-time spoiler readers, you'll want to avoid this one if you're spoiler-free:

In the filmography section at Christopher Lee's Official Website, Lee's Episode II character is listed as Count Dooku/Darth Tyranus. While Lucasfilm have confirmed he was playing Count Dooku, Darth Tyranus has not been officially attached to Lee's name. It's possible this information came from a source other than Lee, but it's interesting nonetheless.

Thanks to Gig'em for the lead!