The "emperor" menu is almost an easter egg, actually - it doesn't appear when the disc first loads, but replaces the carbonite menu soon after.
I've just put on some pretty extensive easter eggs. =D About 9min worth of extra video.
I could have gone even crazier with them, but I don't want to stuff the dual layer up too full, as I'd like it to still be shrinkable to single layer size without ruining it - most people will be watching it that way.
Also, some of the easter eggs I wanted I couldn't get to rip right for some reason.