Well now we know why it wasn't showing up on the webcams: they hadn't even placed the first block to start building it! /sarcasm
It appears I'm late to a discussion of port agreements and long term plans.
A good explanation of the port agreements was given by
@truck1, but I would clarify a few things.
In Port Canaveral, the agreement is based on the number of large ship calls per calendar year, with the requirement increasing to 216 by 2024. Due to their smaller size, the magic class ships only count as 2/3rds of a call for each visit. Two of the new class ships are required to have PC as their primary homeport for at least 5 years, and the berthing rights and call requirement indicate that Disney plans to have 3 large ships there year round with one doing 3/4, one doing 5/5/4, and one doing 7s, although none of that is required by contract.
In Miami, the requirement is based on passenger movements (embarks+debarks), using fiscal years starting in October with contract expiration at the end of April 2024. Despite the contract stating future intentions, there are no specific requirements for specific ships, certain ship sizes, or itinerary schedules. (The specified berthing rights do limit Disney's choices, however.) Indications are that Disney is currently negotiating with Port Miami and/or Port Everglades for a longer term berthing agreement, either using a new berth 10 in MSC's shared use terminal in Miami, or possibly using terminal 4 at port everglades, which it appears Carnival Corp has vacated. Additionally, all written indications are that Disney's south FL plans are for one year round large ship doing 5/5/4, and a large winter seasonal ship doing 3/4 regardless of which port they might end up at.
In Galveston, the contract is only for an increasing number of calls by a ship no smaller than the magic class, although in recent years it seems that Disney has already been running below the required number.
So, for longer term fleet deployment plans, in the winter all 5 large ships are planned for FL with 1 smaller ship in Galveston, leaving only 1 small ship for Cali and/or NOLA. In the summer, 4 large ships are planned for FL, leaving 1 large ship and both smaller ones to split between Alaska and Europe.
Regarding longer voyages, I think the primary barrier is price. Disney likes to charge significantly more than their competitors (per person per day), and extending that to an 8+ day cruise makes the total price unaffordable for a lot of people and severely limits demand. They could probably do more one-off longer cruises than they do, but can understand why the don't dedicate a ship to 8+ night cruises like other lines do. Instead, they're going to focus on the 3-5 market (at least out of FL). I do expect that once they have more ships and the second island built, 4 or 5 night cruises with multiple private island stops will be relatively frequent.
I don't understand this idea that a similar passenger count makes them the same class. We can clearly see from the various photos (conceptual & construction) that the Wish has a dramatically different layout than the Dream class. Like, the elevator banks are in wildly different places, which indicates that all of the internals are probably different. This isn't like the quantum class where they just upgraded some venues and added new features. The Wish is going to be noticeably bigger and vastly different.
