I think you guys are barking (ahem) up the wrong tree. UW didn't invent the Japanese bonus track. Again, that's an artifact of the artificial album price controls in Japan. Because those price controls tend to make the album releases in Japan higher even than imports from another region (say, the US), the Japanese labels/distributors often insist on some type of exclusive bonus in order to try to keep people from buying cheaper imports.
You can read more about this phenomenon in the
Debbie Gibson FAQ 
So you'll just have to accept that Japanese bonus tracks exist. That aside, regarding the editions (Regular/Deluxe/Limited), we don't know yet whether or not all the different editions will be available worldwide, so it's a bit premature to get panties bunched over that, eh?