When "What We Leave Behind" drew to a conclusion, longtime fans of "Arrow" were in for a big surprise. Following her death in Season 4, Black Canary has been physically absent from the show, but her memory has loomed large over the series. So, when she staged a surprise return in the very last scene of the Season 5 fall finale, she left a lot of questions hanging in the air for the winter hiatus. On Facebook Live, "Arrow" star Stephen Amell used this opportunity to address the importance of Black Canary to Green Arrow, though he danced around any confirmation of her return.

When a fan said they'd love to have Black Canary back on the show, Amell said, "I agree. Lots of consternation within the fan base about what's important in... the Green Arrow-verse. And I will say that, forgetting about the show for a second... if you just look at the canon of 'Green Arrow,' John Diggle wasn't actually a character and he's indispensable. Felicity Smoak wasn't really a character and she's indispensable. So we've picked and plucked from various parts of the DC Universe, but -- if you're just getting into the canon of Green Arrow, the comic character, not necessarily the show, but the comic book character -- the Black Canary is easily the most important feature next to the Green Arrow. Period. Full stop. Forever. So it would be very nice to have the Black Canary back. I would agree with that."

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In "What We Leave Behind," Katie Cassidy’s Laurel Lance reappeared, but — beyond that — not much else is known about the character's status. After visiting Susan Williams for a pick-me-up, Oliver shuffled back to an empty Arrow cave, only to see a shadowy figure standing in front of the costume display. When Oliver barked, “Who are you?”, Laurel turned around to face him and said, “Hey, Ollie” — and that’s where the episode ended. Since no one else was in the bunker at the time, it’s hard to say whether or not Laurel was actually, physically in the room. Is she a vision triggered by the traumatic events he just went through? A doppelganger from a parallel universe? A product of time travel, or perhaps even Flashpoint? Unfortunately, those questions won’t be answered until the show returns from its winter hiatus.

Amell also offered a few teases for the back half of Season 5. When a fan asked for two truths and a lie, Amell offered, "There's a road trip. A boys' trip, as a matter of fact, where we're looking for a girl. There is a resurrection, and there is something we dedicated early in the season is destroyed." Of course, one of these teases is a lie, but it's enough to spark some speculation for the direction of Season 5 as we move into the new year.

Starring Stephen Amell as the Emerald Archer, "Arrow" airs Wednesdays at 8 pm ET/PT on The CW. The series also stars Emily Bett Rickards, David Ramsey, John Barrowman, Willa Holland and more.