Even if not at release, then perhaps in the first or second major patch?
I can understand if they don't release them this expansion. Remember, they're already working on a new one which, if their hold true to their new release plan, they'll put out sometime next winter either late 2012 or early 2013. That's early and takes work, so they probably can't put as many people to work on new models (current models are working, the next expansion isn't finished yet, takes higher priority). Plus they need to work on other patches for this expansion.
So would it be reasonable to expect new models in the next 12-15 months?