The KQ universe usually has mainly dealt with elements of the Greco-Roman mythos. The Celts (in the form of the Druids) and Paganism were touched upon in KQ6, and there were many early Christian elements in KQ8.
What other mythologies do you think KQ could stand up with? Could you see, for example, a character of Norse mythology or some aspect of that mythology, as a character in a KQ game, the way Lady Ceres and the Fates appeared in KQ7? How about a character from Arabic mythology, or Eastern or Native American mythology?
Also...What other fairy tales, folk tales, legends, and modern tales would you like to see KQ pull from? For example, the Fisherman in KQ4 is pulled from a tale called The Fisherman and His Wife; The whole subplot of Beauty in KQ6 is pulled from the fairy tale Beauty and the Beast, and so on. What are some other little elements from other stories you feel could comfortably fit in KQ, that you WANT to see?