Did you find the easter eggs on the special DVD.
Those are the little special icons that pop up at the right top corner of the screen on certain menus on the dvd.
Easter eggs are on multiple dvds, they are just little extras that you have to find yourself.
I liked the where they do a little musical to bombs going off and shutting the door, it might not sound like much, but watch it and you'll see what I mean.
Just pop in the special disk and wait for a while you'll see a little icon appear at the top right corner, click it.Now there are three of them so you will have to go to the different menu screens and wait until you click the right one, cause I there are three different ones that I found on different screens.
I found one on the other dvd too, go to the commentary screeen and wait and then click the little icon at the top right and that's the other one i found, let me know if you find some more.
And about the delete you mentioned, the only reason they are like that is because they didn't go all the way and animate them into CG, but they would have if they put them in the film, so if you use your imagination of what they could of been, they are kind of neat, especially the alternate opening.