Super Smash Bros. Brawl Easter Egg - Project Dolphin Reference?

To find this Egg you need to have unlocked the Melee stage ''Big Blue,'' then you play on the stage, as any character, and when you start just pay attention to the background. Sometimes, you will pass big TV screens. Most of the TVs have pictures of dolphins in the sea, which since Melee was on GameCube, this could be a reference to the GameCube's codename, PROJECT DOLPHIN.