Actually, as far as I can tell, not EVERYTHING Main Menu-related is shown here. There are 2 unlockable (menu/loading screen) wallpapers that aren't shown here: one with Bob flexing (Y'know, that super hero character that's the last character unlocked in the character roster, and the goalie in 'The Free Kick' minigame.), and one with all 16 playable characters posed in a "family photo" fashion (it's also viewable at the end of the credits, albeit tinted antiquely).

Regardless, I'm just saying those wallpapers should be added to this sheet even though they are, again, unlockable.

(Game-related note: to see those extra wallpapers in-game, keep earning medals (any, but gold/platinum prefered) until the game shows the pop-up, "New Records wallpaper unlocked." Then, at the main menu (and at saving screens), press + or - on the Wiimote to scroll through them.)