Not agreeing that he should boycott them but after this has happened a few times, the Monsters University steelbook for example it kind of is there fault.
Zavvi is selling THEIR product, if people are getting ticked off with Disney then they are jeopardizing their own product. Zavvi should of said to them by now
"Listen guys, people are complaining here and the only way we can sell your product at full price without people waiting for it to go cheaper is if you listen to the consumer base. Lets not have a repeat of this title-less artwork in the future ok"
The problem I have is that they could release the steelbook on their site, the world wide one like Monsters University BUT don't count it as part of the collection. So your still selling it just not to the same kind of audience (us) who are collecting all the Disney steelbooks in the collection.
Once they've done EVERY steelbook they can, which would be a while, then re-release FROZEN and Monsters University for example just for Zavvi for the collection so it's in line with the rest of the other artwork.
It's such a simple thing to do, they can still release the world wide steelbook just don't make it part of the collection, sell it to other retailers in the UK then do a exsclusive steelbook for the collection in the far future.