The question is not "Why isn't there more Zooropa material?" The question is "Why did they throw Zooropa into their Achtung Baby re-release?" Sure it's not as popular, sure it followed pretty closely afterward. But it's different enough to warrant its own re-release treatment. Surely they could make more money by instead releasing a 2-or-more-disc Deluxe Zooropa with the B-sides and extras so notably absent from this one? And if they're planning to do that anyway, why put it in here as well? It's not like they had space that needed filling.
On another note, the inclusion of Can't Help Falling In Love (Mystery Train Dub) is a mixed blessing for me. I have the Salomé vinyl, it was hard to find, so there's a certain satisfaction in knowing I'm part of an exclusive club of people who have that track (I'm by no means one of those "I prefer bands you've never heard of" types, but simply take pride in my collection). A new release of it means the money I spent on the vinyl (roughly US$40) was ultimately wasted, and I no longer will be so privileged. On the other hand, I don't have the vinyl-cleaning tools required to get all the scratching and fuzz out of that particular record, and the audio sample at the beginning is so incredibly quiet that I can't help but expect the levels of the original song were badly mixed (something I hope is fixed on the CD). So I'll welcome having a higher quality copy. As long as it hasn't been edited for some stupid reason.
Speaking of that vinyl, if the new release is in fact the same, I'll gladly offer up my Salomé record for trade, sale, or possibly free, if anyone's interested. A trade for your Uber Deluxe sunglasses, perhaps?