The transport corridor is being preserved through the new developments so that at least is something. Unfortunately, little thought seems to have been given in the masterplan to locating schools, shops etc on sites ajacent to the proposed metro line.
The Masterplan can be seen
here. There are two possible Metro rountes included in it; the current disused rail formation described as the 'safeguarded alternative tram train alignment' and another decribed as 'main street with provision for future tram-train'.
It's obvious that the 'main street' option is the developer's preference since it would serve the development better but that would be at the expense of increased journey times.