I think they will leave it a little longer as there will be the inevitable backlash of "why isn't this included in the core programme" if they add any new features
I think a better way to go would be for CW to build some "kick ass" Plugins - effects and synths, which would become add ones to Sonar but also available for those running Pro Tools, Studio 1, Cubase etc. to help get the CW name "out there" a little more
I can't think what new plugin would be needed but I am sure CW could come up with something