Wednesday's Arrow finale ended with Oliver (Stephen Amell) and Felicity (Emily Bett Rickards) getting something more elusive than anything else on the show: a happy ending. But what exactly do retired superheroes do?

"What I think is so interesting is that once you help people and have served justice for so long, is that it might become an addiction to a certain extent," Bett Rickards tells TVGuide.com. "It's one thing to go and be happy and sit on an island, but you want to still be doing important work. So I don't know what that's going to be for them. They're going to have a balance of that and hopefully in their relationship as well."

Shortly before running off together, Oliver and Felicity weren't exactly on the best of terms. She was (very rightfully) pissed at him for marrying Nyssa and - more importantly - for his attempted suicide mission. But while Felicity is finally able to convince Oli to break free from the prison he's built around himself and actually live his life, that doesn't guarantee Olicity will succeed as a couple.

Caity Lotz is playing White Canary on Legends of Tomorrow

"When you start a relationship with someone, it takes time, quality time, to literally be 100 percent vulnerable. You can have your soul matched with someone and it might not work out," Bett Rickards says. "And now they're going to be spending all this time together without this job or commitment to exterior forces, and I think they're going to learn a lot more about each other."

But no matter what happens between Oliver and Felicity romantically, Amell says Oliver really has turned over a new leaf and that his newfound happiness likely isn't going to disappear anytime soon. "I hope that as a result of a lot of sacrifice and a lot of hard work that he gets a reprieve, so to speak. That he gets to be happy or a little bit," Amell says.

"The chapter that we wrote for three seasons and 69 episodes, for better or worse, is done," he continues. "There's got to be a new way. I love our show. I really do. But we can't trot out the same thing every year. I don't think we have. But overall, generally, thematically, I think we're moving in a different direction."

However, that doesn't mean Season 4 will find Oliver lounging on an island all year while Diggle and Thea hold down the fort. Amell admits we'll likely see Oliver come out of retirement "at least 20 or 30 minutes into the premiere." As to what brings the lovebirds back to Starling City, Amell says that a potential H.I.V.E. threat to Diggle is a great bet, but Bett Rickards has her own guess.

"I feel like it might have something to do with Thea, because that seems to bring us back like that," the actress mused.

What did you think of the Arrow finale?

(Full Disclosure: TVGuide.com is owned by CBS, one of The CW's parent companies.)