Just an FYI
From previous years, the European cruises, especially the August UK sailings dont really sell out in the first 12 months. UK people hold out until 6 months or less before departure dates when the cruises go to Guaranteed Rates.
I would not measure the sell out rate of the European cruises for 2027 against what is happening with world economics in 2026.
But on the other hand, from various sources who monitor cruise port schedules, it is highly likely that The Wish will be in Europe in summer 2027. This ship will have HIGH demand , especially for the August 2027 departures from UK.
While there may be a drop in Americans booking summer 2027 in Europe, like in previous years there will be a high number of Europeans, especially UK and Irish people booking, so the cruises will sell out, but just not in the same time frame that American cruisers expect them to.