I think the Cal Expo arena should resemble a Giant Tomato!
It will celebrate the central valley's agricultural history, play off the nickname "The Big Tomato" and easily be the most recognizable arena in the league.
Plus no one could accuse it of being soley a Kings arena.
We even have a prototype with an artist rendition of the I-5 water tower:
(Sorry for the small size; the Bee people are being archive Nazis and won't let me get the full version without paying.)
It's only slightly more tacky than the giant castle idea.