I hadn't looked at Scott's blog recently. But I think I can see where some confusion comes in.
So we can look at this 2 ways. 1 is the new build 5, is slated to join the fleet say 2022 in January like posted on the dclblog.For argument sake well say
DCL Triton joins the Dream and Fantasy. This to me doesnt seem likely as mw is moving right along on their ships, and since the DCL 5 is next in line, it would mean almost a year of inactivity for mw. At the very least a slowdown, since P&O next ship will probably follow the NB5 if they swap places.
Option 2 and I think this is the more likely. New build 5 debuts either early 2021 like Jan or Feb of 21 which is traditional for DCL, or possibly as late as fall of 21, which was mentioned by the port, possibly confusing float out date with debut. with 1 of the Dream.class moving to Miami to satisfy the port contract there, with 1 of the Magic class being the 3rd ship in PC in 2022 or possibly NB6. Usually though I would expect 2 NBs at PC with either of the Magic class being the 3rd ship seasonally.
I had it laid out 1 day based on contracts, but off the top of my head I dont remember. I'll try and pull it off my laptop if I can revive it.