I Knew You Before.

Oliver knew Felicity Smoak before the island, they were head over heels for each other. Felicity was pregnant, but Oliver never knew that when the boat went down into the Indian ocean. For five years Felicity grieved and raised their son, Joshua Oliver Queen. What happens when Oliver is rescued? What will Felicity do when she finally lays eyes on the man who stole her heart and gave her a son? The man she believed was dead, but is still desperately in love with?

Laurel is married to Tommy Merlyn in this story, Laurel and Oliver are not friends. Sara was on the island, but wasn't on the Gambit when it went down. Oliver is a billionaire, but was a playboy until he had met Felicity.

This story consists of flashbacks to Oliver's time on the island, and Oliver's return to Starling, Oliver-centric type story.