When Do You Write Broadway Stories About Big Stars ... And When Do You Stay On The Sidelines?

OK – so if Scarlett Johansson and Chris Pine were to land roles in, say, a David Fincher movie…than everyone would knock themselves out confirming, rewriting, posting, etc. No thought about it. Big stars in a big movie = story. But the New York Times reports today that she's a definite yes -- and that he's close -- for “Cat on a Hot Tin Roof” on Broadway. So what happens?

  

Variety -- which apparently had something tiny at the bottom of this insignificant tribute story (about Scarlett, not Chris) a few weeks ago -- does nothing. THR, who has shown that they cover anything “starry” or consumer, also posts nothing. Deadline did post something (but just on Scarlett, no Chris). So what are the rules for Broadway casting, gang? When is a story a proper story -- even as a writethrough? And when do you just ignore it? I'm confused.