That is in the written work. However now we are talking about two towers pictured in a poster for Peter Jackson's video interpretation of Tolkien's book(s).
It seems clear to me that PJ intends to link Orthanc with Barad-Dur. I believe this can be proven by Gandalf's quote in the trailer and then more recently in Galadriel's voice over in the new teaser trailer.
So the movie poster intends to show Orthanc in the foreground, and Barad-Dur in the background. Your leaves are safe Hair.
Update for HOTD:
The fellowship has made it through Moria. However they are down one walker because Gandalf couldn't avoid the whip of a falling Balrog (or if you're Ian McKellan, a falling Balrock).
Well PJ just flat-out got it wrong! :)