It's almost impossible to get anyone's "perfect" feature set in a surround processor. There's always something one person will wish was added and something else another person will wish was left off.
You could call and talk to Outlaw - see the " Contact Us " link at the bottom of this page. They may not be able to provide any definite answers at this point, though, as evaluating technical feasibility of adding new features like PLIIz at this stage has to be down the list of priorities below getting the existing features working and the product into production.

Are you concerned about possible addition of PLIIz, or are you interested in the specific case of combining PLIIz with rear surrounds? If it's the latter, I simply don't see how it will be possible without going with the latest generation Onkyo or Integra (which were built from the ground up as 9.1). If it's the former - if you don't use rear surrounds and could press those channels into service for the height channels - then the question changes and you have more possible options available.