Richard Dawkins to guest on Doctor Who. Can Romana be far behind?

Russell T. Davies has just announced that Richard Dawkins, the celebrated evolutionary biologist, will guest star as himself in an episode of Doctor Who later this season.  As most Doctor Who fans already know, Dawkins has a couple of associations with the long-running program.  First, he was a close friend of the late Douglas Adams, former script editor of Doctor Who (and, of course, author of The Hitchhiker's Guide to the Galaxy and its sequels).  More importantly, however, Dawkins is married to Lalla Ward (aka Romana II).  Now, not that I'm trying to start any rumors - okay, maybe I am - but if Romana's real-life husband is guest-starring in Doctor Who, can Romana be far behind?  Last we saw the erstwhile Time Lady in the classic series, she had chosen to stay in the parallel universe called E-Space while The Doctor returned to our universe.  Let's see, who else in Doctor Who has been left in a parallel universe recently?  Rose, of course!  Perhaps Romana is in the same parallel universe as Rose and used her Time Lady powers to facilitate Rose's brief return in "Partners in Crime."  Could it be that when Rose returns to our universe on a more permanent basis later this season she'll bring Romana with her?  Obviously, this is all speculation at this point....  But it sure is fun to speculate!