Sites like WallpaperSafari and HDQwalls offer dedicated downloads for this specific resolution. You can choose from:
: Dynamic action shots of the full Avengers roster or massive character lineups. 1280x800 Marvel Comics HD Wallpaper and Backgro...
: Retro-style backgrounds featuring overlapping classic Marvel issue covers. 1280x800 Marvel Comics HD Wallpaper and Backgro...