What has never happened in the Jin Yong universe that you think would have been interesting had it happened?
For me, one thing that I wish Jin Yong would have incorporated into his novels is ELOCs that appear in more than one novel. To my knowledge I don't think there is any ELOC who has spanned multiple novels.
Wouldn't it be great if later novels referenced SWORD GOD's peak of perfection, Zhuang Zheng's bravery, Golden WHeel Monk's first disciple's talent, SEAHORSE Hu Liu's tossing of people into the sea, An Fengri's sabre skills, NEEDLE GOD's threading skills, etc.