I think some are overestimating Idina's ability to draw in the crowds. Yes she is very popular and has a huge fan base but if the show sucks ( Highly doubt it will) But if it does, and she gets horrible reviews then its likely the bad reviews will travel faster than the Idina Hype. It's hard to create word of mouth when the show and the leading lady is getting gutted by the critics.
Let me state that this is all hypothetical. I am actually super excited for this :)
So Lauren Bacall me, anything goes! *wink*