I can remember reading articles about the then A3XX, what the A380 is called now, way back in 1999/2000, Airbus even then did not expect many sales in the US, maybe UA
in time, but no expectation of major sales in North America.
Still launched the project though.
Pacific Rim, Mid East (up and coming airlines there emerging now), Europe, these were seen as the main areas for sales, in that order, the US was way down the list.
After all, what prospects for future 747 sales in the US?
Pretty poor I'd say.
Now I could be tempted to stray from topic here, and respond to some of the lame xenophobia on this thread, by pointing out that most nations (especially 1st world ones) have rather more than about 25% of their citizens with passports.
The US market is the biggest, but it's mostly domestic, not what the A380 was designed for, BTW, 30 years ago Boeing did not build the 747SR just for Japan, they had hopes for domestic US sales too, now we know how long US domestic routes supported 747s, all gone by the mid 70's I think, so no help with the SR
Airbus will lose little sleep over lack of US A380 sales.