Now there are not that many material, like concepts or nice screenshots, to create something interesting, but we have very small epic trailer and logo... why not use that?
Here are first Generals 2 wallpaper, mostly in grey and red style, but with some design, that was at Generals: ZH loading screen.
1920x1200 - 1680x1050 - 1440x900 - 1280x800 (16:10)
1600x1200 - 1152x864 - 1024x768 - 800x600 (4:3)
1920x1080 - 1280x720 (16:9)
And two logos (white version - standart, and dark version - for light backgrounds), recreated by me in high resolution. Click for enlarge. WARNING! Both logos are giant and their size is 3009x506 and ~1.3 mb