Zavvi have not done any artwork design of any steelbook releases not a single one you do know this don't you
All artwork design is by the film studios/distributors
Zavvi are only a on-line retailer owned by the hut group and just sell products designed and made by other companies
Zavvi get offered releases to sell by the film distributors and some of these they get as UK exclusive for period of time but a lot of these same steelbooks also get a release in various countries in europe with some been released in europe before UK
Some of the stock they receive after initially selling out in the UK is stock from the european releases from the distributors as in stock not sold.
Some releases a small number Zavvi had given suggestions in regards to artwork as in designed artwork already owned by the film studios but Zavvi don't do any artwork design themselves.
Most steelbook releases now are shared print runs across europe with Zavvi just getting exclusive for the UK with the same steelbook released at various stages before or after UK release