When there's enough demand for them.
"Ambersons, Chimes, Macbeth, Othello, or The Immortal Story"
Ambersons and Macbeth you would think would have some kind of market, but Immortal Story will probably never come out in NA: too esoteric. As for Othello, it's out: and until Beatrice dies, that'll be the official version and the only version. And she's only 49, so don't hold your breath.