A good question about post pandemic ridership, johnpbarlow and I agree with Wicked that the single track being possibility problematic in regards to service frequencies. Also I would be understandably upset if the Middleboro Lakeville station was eliminated after I had rented a place near there. With that being said, there was an article in the Cape Cod times posted on September first about exploring the idea of a commuter rail service to Buzzards Bay could tie in with phase one of South Coast rail. Although not specified, such a hypothetical service could continue to make use of the existing Middleboro Lakeville station as well as a new station in downtown Middleboro. The station would also continue to be used by the Capeflyer as well. Whether or not the Buzzards Bay train would be a shuttle to Middleboro proper or a direct train to South station is still to be determined, but by tying it in to South Coast rail, the cost could be a little lower as the other factor is that not much upgrade of the track Between Middleboro and Buzzards Bay would be necessary as the line went through upgrades back in the 1980s and is also used by the Capeflyer.
If Boston to Cape Cod rail service occurs in 2012 I will eat a jelly doughnut dipped in tomato sauce.