gypsy101 said: "this news of the cast has made me so sad. the day the tickets went on sale, I was on a plane at the time so I couldn't buy the tickets myself, but a friend of mine hunkered down to get us seats and got stuck in that infamous line that ticketmaster had that day. She never got tickets (we needed three and by the time she got through there were only singles) and now with this....I hope I don't miss Karen altogether. I'm hoping against hope that she's still there when the next round of tickets are released (though obviously I won't hold my breath)."
The show didn't sell-out that first day, so unless you had very specific dates in mind, you should have been able to get tickets (maybe not good tickets, but I digress). I remember finding it amusing that scalpers on the TM resale site were charging $1000 for tickets to a show that was not yet sold-out. While that initial frenzy was unusual for a production in Chicago, it appears to be selling about the same as Wicked did initially (though I think there's more of a worry that Hamilton may close-up and tour sooner, not due to lack of demand, but the desire for more money on the road, so people are more anxious to get tickets now than they were with Wicked). I'd be surprised if the same type of chaos ensues when the next block of tickets goes on sale.
I wasn't around when Wicked had its sit-down, but back in the day with Ragtime and Show Boat and Phantom, the contracts were usually six months.