Once that stage is finished, star on Streets of America and the back area expansion of Pixar Place. Followed by redoing the central area and Animation Courtyard. Finish by touching up Sunset Boulevard and redo the entrance with a temporary entrance straight into the new Echo Lake area and puff done. If they take the same approach as they did with Disney California Adventure you could see a brand new Disney Florida Adventure by 2021..
This is the likely plan. However, unless they completely finish SW before moving on to Pixar Place, there will be a time when that entire side of the park is closed. The way TSMM is sandwiched in between areas marked for reconstruction, it is hard to imagine it staying open during the process. Same with Little Mermaid. So while that area is being addressed, people would be paying full price for Sunset Boulevard, Indiana Jones and the Muppets. When Tomorrowland closed, there were still 30+ other attractions in the park. The staged closures you predict will result in times when DHS has about 6. However, if they do finish the SW plans before moving on to Pixar Place, there would be more attractions to enjoy,but you'd be looking at a 2025 completion date, not 2021. Closing the park would cut that time in half. And time is money.
I was only there a month ago, and it was my 4th trip in a 20 year span , but I still found plenty of ways to fill a day. Asides from the Studios related attractions like the backlot tour etc and some of the 'behind the scenes' attractions being gone. I'm struggling to think what is missing from the park...
That's a bit like saying: "Well...other than
that Mrs. Lincoln, how did you enjoy the play?" DHS is supposed to be studio driven. So when you take away "the Studios related attractions like the backlot tour etc and the behind the scenes attractions" you have ripped out the heart of the park. It is hard to imagine losing the Backlot Tour, an attraction in the Millionaire/Idol theater, the Animation Academy, the AFI Museum, One Man's Dream, Sounds Dangerous/Superstar Television, a display in the 101 Dalmatians/Narnia walk through area and not notice what is missing. I just rattled off close to 4 or 5 hours worth of stuff to do.
First of all... not going to happen.
One half of the park is potentially unaffected by the plans, and in that half are some of the best rides in all of WDW, a few quality shows, and a terrific spectacular.
Work goes on in AK, so where's the need to shut down the entire HS?
I agree it's not going to happen. But where's the need? Speed. And the sense of magic and place. Imagine what it will look and feel like to walk to TSMM when everything else around it is under construction. Magical? What is in the half of the park that is unaffected? ToT, RnR, Beauty and the Beast, Star Tours, Indiana Jones and the Muppets. That's worth a full day's admission? Why risk guests being sorely disappointed with their "Was that it?" reaction? Seasoned veterans might be happy blowing in and out of the park in 3 hours. But what will first time visitors think?