The second half of "Arrow" Season 5 has a lot in store for fans with the relationship of Oliver Quinn and Susan Williams going full throttle, but not without some major problems. Furthermore, the revived Laurel Lance is not the Black Canary everyone knows, but the Black Siren of Earth-2.

According to TVLine, Executive Producer Wendy Mericle said that Oliver and Susan's blossoming romantic relationship will not be without major hurdles. She confirmed that fans will see the two "going to go 'all in' [on the relationship] at some point."

But this is not without obstacles, as Mericle notes that Susan has been trying to find out who Oliver really is and what he is up to. "And not just as the mayor, but beyond that," she said.

Mericle adds that Susan will be "asking some hard questions, and that's going to put both of them into physically and emotionally dangerous territory." She did confirm that the two have a genuine relationship and they both care for each other.

Aside from the blossoming relationship of Oliver and Susan that's going to be problematic, fans will also get to know the real identity of the revived Laurel. Stephen Nevets of The Global Dispatch said that this Laurel is actually the Black Siren of Earth-2.

Nevets' assessment came after one of the scenes in the extended promotional video of Arrow Season 5, Episode 10 show Laurel attacking everyone with the "Canary Cry." Oliver then said that "that's not our Laurel," and the next scene had Laurel saying "finally, it's about time someone figured it out."

The series will resume on January 25, 2017, and fans can watch the promotional video below. In other news, Netflix has made downloading hit series like the "Arrow" available on iOS and Android worldwide and at no extra cost to subscribers.