Because they used the U.S. official theatrical release posters on the recent 4K wave of Marvel and Star Wars SteelBooks.
To say they
should have used the UK poster for a movie made by an american owned studio for a SteelBook exclusive to a UK retailer is an opinion.
If you use 10 U.S. posters and 1 UK poster do you still have a matching set?
Or is it a matching set because all 11 will use the official U.S. posters?
It's all opinion. To say Disney failed is an opinion, not a fact.
Neither Disney nor Zavvi owe any of you an explanation or a statement as to why they have chosen the route they have.
Even if they did tell you the reason you wouldn't be satisfied. The SteelBook would still be the same and you would still be saying they should have done this or they should have done that.
Reminds me of children who are denied a candy bar.
CHILD: "Why can't I have a candy bar?!!!"
PARENT: "Because it will spoil your appetite for supper"
CHILD "Oh. OK I understand that it and makes perfect sense. That makes it all better." yeah as if.
Even if Disney told you the reason, you still wouldn't be satisfied.
Suck it up Buttercups.