Personally I believe this ship would be really interesting if it was a forbidden love story but not to the point where its painfully generic.This is what I was thinking for the story.(not in order)
1.Former Kinkuo meets a member of Order of
Shadow/how they meet
2.Learn more about the characters
3.Akail thinks about her beliefs
4.How Zed,Shen,and Kennen will react/find out
5.Learn more about Darkin corruption
6.Zed uses Kayn's love for Akail to bring her to the Order of Shadow
7.They realize that they have the same enemy(noxians)but yet they are enemies to each other.
And of course we can't forget about:
"Kayn,why are the hot ones always crazy".