I think there is a difference from an evergreen show that gets revived (ala How to Succeed; A little night music, etc ) as opposed to a show that in and of itself probably wouldn't justify a BW run without the star mounting. Sure some stars can goose a show, but it doesn't mean the show can't do well on it's own. "How to Succeed" was successful in 3 mountings on BW so far with 3 stars (Robert Morse, Matthew Broderick, Daniel Radcliffe).
A revival can falter, but there are reasons such as the score, the book, etc that can make it work even without star power. It's not like Showboat falls into this category even if it flopped next time it was on BW.
Something like "Coco" from all accounts (the Tony number on Youtube is howlingly bad) was just a star vehicle to see Ms. Hepburn and has rarely,if ever, been revived anywhere.
"when I’m on stage I see the abyss and have to overcome it by telling myself it’s only a play." - Helen Mirren
Updated On: 6/1/15 at 11:35 AM