Just added the following backgrounds for 4.0:
- San Feng
- Feathered Anka
- Ares Varya
- Athena Varya
- Dragon Master Catherine
As usual, when the update goes live, the default background will be the new hero, San Feng, but if you’d like to select one of the others, just go to the Preferences --> Interface tab on your profile and pick the one you want from the dropdown! (You may need to refresh your browser to see the new choices due to CDN and browser caching, btw.)
NEW FOR THIS UPDATE: Because 3.10 was such a short patch, the backgrounds from 3.10 will be sticking around through the entirety of 4.0. Also, these backgrounds are live right now, so go ahead and give them a try!