Easter egg: Under Join the Brotherhood (Magneto's side) Go to Features. Then Deleted Scenes. Press "More" until you find the scene called "Henry Warns About Magneto". Highlight it, then press the left arrow to highlight an "X". Press enter and you will get to watch a short 2005 promo for the movie. Under Take a Stand (X-men side), this feature requires you to highlight "X-men land the chopter" then press the left arrow to highlight a "Magneto Symbol".
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.
Easter egg: On the disc's main menu, wait for a couple of seconds. Kate's rump will appear and will do a stinky like her son (Stinky). Press your down button until you see PRRRP. Press your enter button to see a clip of Kate teaching you to spell the word "POOP" and some weird message that is saying stinky stuff. Whew. On the special features menu, go to the second page. Highlight the "Photo Gallery" menu entry and press your enter button to highlight S Club. Press your enter button to watch this.