The Metropolitan is extremely, extremely well organized. The Colon has always been chaotic. What will happen is this: Once the box office opens there MAY be a few leftover tickets for the operas but don't count on it. This is the reopening after several years and a lot of people will be interested in attending. What you MAY find are a few tickets for the obscure operas that few people will want to see. I suspect that whatever tickets are left over will be bought up by speculators (or Colon employees) and sold at a profit to agencies who in turn will sell the tickets at a huge markup. Your best chance of getting in will probably be to look for a concert of the Philharmonic. Also cheaper. I hope I am wrong about the difficulty of getting tickets this year but I don't think so. Also keep in mind that ticket prices this year, at least subscriptions, exceed Metropolitan Opera prices. Individual tickets are usually more expensive than subscriptions divided by the number of performances. Also, there will probably be individuals selling tickets in front of the Colon an hour or so before the performance.