This would not be the first empty gesture connected to the tramline, some years ago Boris Johnson had a large number of photos taken of himself standing next to a tram with the destination "Crystal Palace" on its front, with Boris gushing away about how extending the line to Crystal Palace would regenerate the area. When asked how much it would cost, he cheerfully replied that he had no idea.
I suspect that Boris was fully aware that such an extension would not be seriously considered unless there was a watertight proposal to rebuild The Crystal Palace, which has been on the back burner for the past eighty years.