Waugh Redivivus?

A correspondent (thanks, Joseph!) pointed me to this site. Apparently one Michael Johnston is publishing a sequel to Brideshead Revisited. In my occasionally humble opinion, "unauthorized sequels" are almost always a mistake. I'm willing to be convinced otherwise. But it will take some doing.

Brideshead doesn't need a sequel. The tale was told to perfection the first time. Take a look at Elmen's 20 year old essay on Brideshead (and ignore the reference to Charles Curran). If Dr. Elmen's view is correct (and I think it is) how could a sequel add anything? In fact, how could it fail to do anything but detract?