I'm disappointed that having re-issued the HP series on Blu-ray with a smart, uniform look (the 'Year' banner placed identically on each cover and spine), Warner Bros seem to have abandoned it with the first new release! It's a shame, as they do look good as a set.
The blu-ray i bought from HMV has year 6 on the cover artwork - in keeping with the re-issued blu-ray artwork. I don't know what the cover art is like from other sellers but I would think it would've been the same. The blu-ray has a card cover that covers the blue plastic case. This cover art you see on Amazon is the card sleeve.
Yes, I got mine from HMV and was pleasantly surprised when I removed the outer sleeve! Hopefully this cover style will remain for the last two films. I've added it to the product page as a customer image in case anyone else was wondering.