I suspect that they are waiting to build that section of Bradley untill the new subdivisions around there
absolutely warrant its construction. And any further extension of Bradley will be at the whim of the developments around it.
If the part between Wharncliffe and Wonderland is built, it may just be a stub used for the subdivision and plazas, as the section immediatly after White Oak rd. could be built at a completely different time. I think it's more about meeting the needs of those new developments, than actually building one cohesive, necessary transportation link for all residents.