It is thought that Camões - P Real is temporary, maybe to see how it goes. There is talk of going to Carmo, but that will require points so that a car going up Rua da Misericordia can turn right and then go down to Carmo.
There was an idea of something like São Tomé - P. Real, while extending it on past P. Real has also been talked about. Either to Campolide, or across to Estrela on the old 25/26 route. It has been reported that when Rua Ferreira Borges was resurfaced recently, the rails were purposely not buried, but there is no overhead there. This
latter might not be too bad if the poles are still in place.