Our theater has taken a chance on stars - winning some, probably losing more - over the years. One need only look at the achievements of the famous names on this past Broadway season to recognize the bold line that separates stunt casting and ingenious matchups.
But is there something about "Twelfth Night" that works as a magnet for high-gloss names? Perhaps it is the strong female characters, alas, not often a given with Shakespeare. Viola/Cesario offers an extended chance to play both female and male, romantic and foolish. The play has enough comic knaves and related bumblers to challenge the best in character actors. The mysterious island lets directors imagine any time period.
Of course, directors can play around with the setting of Twelfth Night, but I always think of The Tempest as having the mysterious island.