Yes, there is a development plan for the Humphrey Brook neighbourhood which includes a road connection to Harrisville Blvd:
This plan however has been around for at least a half dozen years, and is no longer completely valid as Robert Irving is unwilling to cooperate. He in fact bought additional land in the area to put the kibosh on this (at least along it's western extent).
There is a long buildout for this plan. The actual connector to Harrisville Blvd was supposed to have been built in 2020. This obviously hasn't happened yet.