If it gets good reviews, this production has the potential to move to Broadway in which case a 1-2 week extension is likely as they try to make a case for audience's willingness to watch it; it's definitely happened before a lot. The show will compete heavily with the rumored Angels In America revival audience if they both move, so I don't envy whoever decides to take the risk on this one.
I'd recommend having backup options since it's too early to tell. Sweeney Todd will be around if you want to fall in love with Carolee Carmello.
PS - You're arriving on a Monday, make sure you have tickets for a Bette night and not Donna night (unless you wanted latter, in which case yay!).
Caption: Every so often there was a rare moment of perfect balance when I soared above him.