I was interested in the subject and outline of the play - and I would love to see Ben Wishaw live, in a play which I'm interested in - but I had qualms about whether I would actually enjoy this play, so I waited for reviews and for informed comments like Alexandra's, and the outcome is that I shan't be attending.
I think Michael Grandage pulled off a brilliant coup by announcing five plays and only seven actors, and inducing hordes of people to immediately chirp away about how marvellous the casting was, etc., etc., without considering whether they might actually have any interest in the plays or who the other seventy-odd actors might turn out to be. As Lynette says, publicity is an art!
May I add that I think it's a very worthwhile season, and I believe that all the plays were chosen on their merits, and not just as star vehicles for one or two lead actors.
Also, I like the Latecomer approach of being open to new unknown things, which may or may not turn out to fascinate you. This is very different from attending a play advertised as being about two childhoods and then berating it for being about two childhoods.