Wulin enmities run deeply. Many wulin enemies hate each other so much that cooperation between them is unthinkable...both to them and to readers/viewers.
Which wulin enemies who have never cooperated or otherwise stood on the same side would you think would have an interesting experience working together? Which enemies in wuxia fiction could you see actually working together, albeit not necessarily permanently, towards a common goal? Which wuxia enemies would you want to see working together (just for the novelty or "coolness" of the idea)?