I am not aware if Sonic HQ’s has seen this or not, but I was surfing Sonic Team and they have new Desktop Wallpaper up. Sonic type of course! 
You can download 800×600 or 1280×1024
Fri Apr 26, 2024 | 0 d
Wed May 1, 2024 | 5 d
Wed May 29, 2024 | 33 d
Wed Jun 5, 2024 | 40 d
Autumn 2024 | TBA
Fri Dec 20, 2024 | 238 d