Hello. I've been compiling all of the season pass background images as desktop backgrounds. The bungie media folders do not contain the background of the season passes. I have found most of them on places like artstation but am having a hard time finding the full rez versions of seasons 8 (undying), 11 (arrivals), 12 (hunt), 12 (risen), 21 (deep), and 22 (witch).
You can inspect the previous season page to find a low quality image of the season pass background but you can only do that for the previous season. Thanks for any leads.