Easter egg: When on the main menu, if you click down after the the 'Trailers' button a button will appear on the top left corner of the screen next to the 'Main Menu' Title. It is the credits to the makers of the DVD.
Easter egg: On Disc 2, highlight "According to plan", press Left twice. This should highlight a leaf. Press OK to watch how the food was made for the entire film crew.
Easter egg: Easter Egg on the 2-disc Special Edition Region 1 DVD: Go to Special Features, then Deleted Scenes. Place the cursor on "Features" at the bottom and then press Down once. A red Superman logo will appear below "Features" and "Menu." Now select the red logo and press Enter and you will see some funny outtakes of Kevin Spacey doing his "Wrong." scene.