The CW's "Arrow" Season 3 ended earlier this month and fans are already anticipating for what's next for Team Arrow. Ra's al Ghul died in season 3 and the team is now left without its leader. Stephen Amell reveals some interesting details on what's next for season 4. This article contains spoilers for "Arrow." Read on to learn more about this scoop.

"Arrow" season 4 premieres next fall, but fans already anticipating for what's to come for their beloved characters following the show-stopping third season, which left Ra's al Ghul dead. Stephen Amell recently revealed to Melty that while season 3 ends with Oliver and Felicity's romantic journey, the couple will soon find "trouble in paradise" in season 4.

Amell was mum about details on what's next for "Arrow" season 4, but the actor also dished that Arrow simply cannot exist anymore because Roy sacrificed himself and doing so would "undo all the sacrifice that he made." The 34-year-old actor also confirmed that Damian Darhk will be one of Oliver's potential nemeses in season 4.

Meanwhile, Amell shared quite a mischievous smile when the Green Arrow was mentioned on screen. Amell wittily replied, "I mean, would it? We'll see."

As "Arrow" season 4 is gearing for a fall premiere, most fans have already come up with a list of superhero characters and villains they wish to see next season. Harley Quinn is one of the fan favorite villains to appear in The CW series, especially after her surprise appearance in season two.

Willa Holland, who plays Thea Queen, seemingly shares the fans' sentiments about having Harley Quinn star in "Arrow." The actress revealed that the network initially had "big plans" for Harley Quinn's character in the series, but they suddenly had to shut the idea down due to give way to the "Suicide Squad" movie

"And then something must have come down from DC or some higher up that said, 'no, you must cease and desist because we're going to make it into a movie and we can't have anybody spoil that idea,'" Holland said.

While it might be interesting to see Harley Quinn take part in battling against Oliver in season 4, Holland dismissed the thought and said that "it's never going to happen."