On what Tober was alluding to... Store BUYERS (at their various head offices) know what is coming from Hasbro, from the annual Toyfair, for up to 6 months (because I've seen their ordering forms listing the actual wave assortments, and listened in on the presentations by Hasbro Reps detailing which important characters are in certain waves).
The staff at individual stores won't know jack... because they don't know what they get until their head office/warehouse (not Hasbro) sends it to their store.

Bugging an individual chain store (Toyworld is an exception) would be pointless, as most are allocated stock, or have automated ordering based on their designated minimum stock quantities (as in, they will only re-order when it gets below X number in stock, and IF their head office/warehouse still has them in stock). And their warehouse will not restock items that are slow moving, because it is a waste of precious floor/racking space. (speaking from experience)

The only people that have any power to increase stock in the stores (except at Toyworld) is the Head Office "Buyers"... the people who go to Toyfair, and will only listen to Hasbro Reps and sales stats on their existing product (to know what's worth re-buying, or not).
This is what the store staff really means when they say they don't know what is coming and when.
Hasbro is not the reason, the Store Chain "Buyers" are. It's why toy companies spend a lot of money on Toyfair to convince those small number of people to stock their product, and keep restocking it. Outside of Toyfair, it is up to Hasbro Reps to keep the "Buyers" coming back if the product doesn't sell well enough... by offering discounts for Store Sales.
And it isn't just with Toys either. It happens with most products, especially in Grocery. All those really big weekly specials of big-brand items in the grocery catalogues are from "Buyers" and suppliers negotiating temporary discounts on their stock to get in a new shipment and sell it fast at the stores. You should see the mountains of Coke and Pepsi we get in our warehouse in the week before a sale... and sometimes it has to be added to a future catalogue because a Buyer managed to get an unplanned good deal (and we end up with 100 pallets of 2-litre Coke taking up space for 3 weeks).


As for the First Edition Prime toys being imported but not sent out anywhere... I find it hard to believe, because their most senior person there for TFs has said twice that they were never planned for release here. And since stores pre-order mainline products, I'd find it very unlikely that they'd import a new line in without it already being mostly pre-ordered. It'd just be too much of a risk. They don't even bother importing store exclusives if they don't have a store signed up for it.

With Hasbro Australia recently telling us that we weren't getting MP10 released here, while TRU said we were, it's difficult to know what to believe from them now.
It'd be great if they did get in a shipment of First Edition toys, which make their way on clearance at Toyworld in a years time, but it just doesn't sound like it's possible.