You shouldn't have any issue with ordering that unless you waited too long and it's no longer in print, it comes out next week so if it's available to order there should be no issue getting it. This is how I order all my books, previewsworld gives you 2-3 months in advance to get a book ordered, you send a list of the previews code to the comic store and they order it.
This is why checking the new catalog on previewsworld is pretty much a must, it releases once a month and gives you time to go through the catalog and compile the list of comics you want, send to the comic store and they confirm the order has been placed and you collect the books when they release, no running around last minute trying to find a book, getting dissapointed a book wasn't ordered or paying inflated prices because the book is getting a lot of attention. I've used every comic store in SA and so far I've had no issues with any of them, the only difference is the price, some cheaper than others.