Will 'Parnassus' Continue Through CGI and Internets?

Though he seems unclear on the details, The Imaginarium of Doctor Parnassus actor Christopher Plummer has spoken out on how director Terry Gilliam may still try to save Heath Ledger's final performance:
[Gilliam is] trying to work out at this moment how to continue on. Fortunately, because the film deals with magic, there is a way, perhaps, of turning Heath into other people and then, using stills and I think they call it CGI…
It's clear by his grasp of the term CGI that Plummer has no idea of the specifics of this, and may actually be referring to the Internet, mp3s, or the auto-gyro. But if it's true, I'm curious if they're considering "morphing" him into other actors (like the rumored Johnny Depp) to finish the character's scenes or if it's more along the lines of animating a CGI-Ledger for half the film. I hope the latter, because, as experience has taught us, it's not at all creepy when you see a posthumous performance given through lifeless, computer-generated eyes.
