1) Animals. Not a load of fur or anything, but patterns and colours from nature. Tbh though this would have been much better for PRISM (Roar = Tiger/Lion, Dark Horse = Horse, WOA = Birds) so its kind of a shame she didn't take advantage of that in some way.
2) Space. This could create some really cool and understated looks that aren't over the top but are still really nice, and also it's more mature while still giving a loose theme to work with