A Note From Roberta Williams On King's Quest II
"King's Quest II reminded me a little of Wizard and the Princess. We saw how the previous games (Mystery House and King's Quest I) were received by the public, and I was anxious to try my hand at a bigger story right away. Graham would be King by now. What quest should a lonely King go on? What should he see in through the magics mirror? A maiden in distress! I started to forsee a family for Graham in the future. I couldn't fit some ideas into King's Quest I, so I was happy to get a chance to include King Neptune, Dracula, everyone from Little Red Riding Hood, and that infamous rickety old bridge you could only cross so many times.
There's an "Easter Egg" in King's Quest II. Find the cave with a symbol of a black bat over the enterance. Walk south off the screen, then walk back to the cave. Kepp doing this, and you'll see the Batmobile drive out."
The quote originated from the Roberta Williams Anthology Manual.