I'm curious if there might be a sort of "Fanny Brice passing of the torch" at Julie's last performance before Lea Michele takes over. It would make for good publicity if L.M. would appear at the end of that performance and J.B. gives her some sort of memento related to Fanny. I don't know if this scenario is within the realm of possibility, but it crossed my mind.
"Noel [Coward] and I were in Paris once. Adjoining rooms, of course. One night, I felt mischievous, so I knocked on Noel's door, and he asked, 'Who is it?' I lowered my voice and said 'Hotel detective. Have you got a gentleman in your room?' He answered, 'Just a minute, I'll ask him.'" (Beatrice Lillie)