This one would be loosely based on the tv series, but not bound by it. I really want to create an original take on the characters and situation.
Oliver Queen has returned from five years on a hellish island, and now seeks to use the skills he learned there to bring justice to his city. The problem is that while the island might have taught him how to fight and shoot, it gave him no information on how to hack into databases or track a foe's digital movements. In order to complete his mission, Oliver is forced to recruit someone with the skills he lacks.
His search ends before it ever really begins. While walking home, Felicity Smoak is attacked by a mugger, only to be rescued by the Arrow. Oliver recognizes her as an employee of the company, someone with unrivaled computer skills. Bringing her into the fold puts her life at risk, but it means protecting the rest of the city.
I would like to see this develop into a loving romance that is mixed with action. The two have to learn how to deal with their significant other being put into harm's way, and have to consider that even together, they may not be enough to save the city.
I might also be interested in a pairing between Oliver and Laurel/Black Canary. He could help train her for working on the streets, but I don't have as clear of a plot for that one.