The State Government has released a plan for a foreshore bike and walking path from Parramatta to the Opera House. Total length is 91 km, so not meant as a direct route, but a path you could use bits of to explore the foreshores or complete the whole route over time. They have started with 12 projects that they say are feasible now and are also useful as part of other routes. One is a path next to Massey Park Golf Course in Concord. Another is upgrading Foreshore Rd in Callan Park to remove car parking, although this has already been announced as part of a Bay Run upgrade.
Future progress will depend on a steady roll out of funding, which could be problematic. Any business case might well decide that other more transport-oriented bike routes might be better value. However, more foreshore paths would be great for Bike Leichhardt recreational rides.
(Includes a link to a download of an animated loop of the route)