The 200,000 GT class was supposed to be delivered starting in 2029, (according to the reports) but Josh Weinstein was saying 2027 one would be order for, so this makes sense.
For names I think maybe Holiday, Tropicale, or Festivale to keep the former ships names going like the other excels have had.
The 200,000 class (don't know what to call it) might be a little early for Fantasy class? Destiny could be a good idea since the original crossed the 100,000 line and this one would cross the 200,000. Sunshine might still be in the fleet but the Destiny name was retired 10 years ago.
There could also be a new name for either of these classes, but I think the 4th Excel will have a former ship name