We've datamined some splash images for the upcoming Season 4 Battle Pass in Diablo 4. While these are not the models themselves, the datamined images look like those that are used as the backsplash on the Battle Pass — take a look at the different armor, weapons, mounts, and gravestones!
Diablo 4 PTR Now Available to Download Diablo 4 PTR Patch 1.4.0 Patch Notes