Avalance after season 3

Crossover: Earth 38 needs our help

It's been less than a day since Ava proposed and already something bad has happened.

Sara comms her team and tells them to meet her on the bridge. It takes less than a minute for Amaya, Zari, Nate, Ray, Nora (and yes I do mean Nora Darhk (she's now Ray's girlfriend)), and Mick to assemble. As soon as they're all there, Sara accepts the transmission. Kara, Alex, Winn and a man Sara doesn't know appear on the screen. The boy introduces himself as Mon-El. Kara tells them that something bad has happened on her earth and she needs Sara to get all the help she can, and please bring them to earth 38 to help them.

Sara automatically uses her time courier to get to the time Bureau and Ava, she tells her fiancé the situation and Ava is quick to offer help. The two hurry back to the Waverider.

The first stop the Waverider makes is Central City 2019. There the pick up team flash: Barry Allen/The Flash, Iris West-Allen, Cisco Ramon/Vibe, Caitlin Snow/Killer Frost, Wally West/Kid Flash, Joe West, Harry Wells, Ralph Dibny, and Cecile Horton. Because Jenna West is too young to stay on her own, Celine and Joe bring their daughter along.

Their next stop is Star City 2019. There, they head to the bunker and pick up Oliver Queen/The Green Arrow, John Diggle/Spartan, Laurel Lance/Black Canary, Rene Ramirez/Wild Dog, Curtis Holt/Mr. Terrific, Quentin Lance, Thea Queen/Speedy, Roy Harper/Arsenal, and Felicity Smoak/Overwatch. Oliver and Felicity's month old daughter, Rose, Oliver's 15 year old son come with them. While their in the bunker, Sara walks up to Felicity and whispers in her ear.

Back on the Waverider, Sara tells them they have one more stop to make. She then turns around and asks Felicity "Did you find her?" "She went back to Nanda Parbat." Felicity answers. Sara takes a deep breath then says "Okay, Ollie, Ava, come with me. Ava, I need you to open a portal to Nanda Parbat for us." Ava nods and Ollie asks "Why do you need me." To which Sara responds "Because you know just as well as I do that after me, you're the only person in the world she will even consider listening to." A look of recognition and surprise crosses Ollie's face and they step through a portal made by Ava's Time courier. As soon as they're gone Nate says "I know we're all thinking it so I'm gonna say it. Who are they going to get?" Felicity swallows deeply before responding. "Nyssa al Ghul."

Sara, Ava, and Ollie step through the portal onto the ground right outside the abandoned compound that used to house one League of Assassin's. "This way", Sara says and leads them to the room that used to contain the Lazarus Pit. No one's there. Next, they try the training rooms, and again, they're deserted. Suddenly, Sara stops and swallows, then says "there's only one other place she would be, especially today." Ollie asks what today is and Sara says "Seriously, Ollie what's today's date?" He responds immediately. "October 8." "And..." He looks confused. "What happened 4 years ago Ollie." He then looks surprised. "Oh." Sara notices Ava's confusion and says "I died on October 8th 2014."

Sara leads them through a maze to corridors and eventually Ollie says he doesn't recognize where they are. "Really, I thought Ra's would have shown you every inch of this place." Sara replies and Ollie says "most of it, I thought all, but I guess I was wrong. I don't think they use this part of the complex anymore." Finally, they get to a worn wooden door and Sara hesitates. When Ava steps up beside her and kisses her ring finger, offering silent comfort, Sara opens the door. Kneeling by the foot of the bed and muttering in Arabic is a woman with dark hair dressed in all black, suddenly, she pulls a sword off her back and goes to attack until she realizes exactly who has interrupted her solitude. "Impossible." The woman breathes, her eyes fixed on Sara. "Hello Nyssa." Sara replies keeping her eyes on her former girlfriend but twining her left hand through her fiancée's right. Only then, does Nyssa realize who stands on Sara's right. "Oliver." "Nyssa." Oliver replies. "We need your help." Sara says. And expects at least some resistance but is surprised when Nyssa says "Anything."

Sara quickly turns and puts a hand on Ava's arm, immediately knowing what Sara needs, Ava opens a portal and takes Oliver back to the Waverider, trusting her fiancé and giving Sara time to inform Nyssa of everything that has happened since they last saw each other.

As soon as the portal closes and they're alone, Sara turns back in time to see Nyssa bolt across the room and pull her into a hug. Sara returns the embrace but quickly pulls away. "Oliver told me you were back but I never thought I'd see you again." Nyssa said with so munch love in her voice. "Me too." Sara replies. "So, why is it you have need of me?" Nyssa asks and Sara responds with "A friend contacted me, where she lives is in danger, she didn't tell me what kind, she just told me to bring as many people to help as possible." Nyssa grabs Sara's arms and says "Of course I'll help." As she says this, her hands slide down Sara's arms to her hands where she brushes against the ring. Nyssa immediately looks down, her gaze full of surprise, she lifts Sara's hand up and see's the engagement ring Ava gave her last night when she proposed. "Who? When?" Nyssa breathed. Sara smiles, "Her name is Ava, and she proposed just last night." Nyssa notices how Sara's eyes fill with love and happiness when she looks at her ring and talks about Ava. "You just met her actually, she was just here with me and Ollie."

As soon as Sara says that she opens a portal to the Waverider and Nyssa follows her through. She immediately goes over to stand by Ava at the console and says "Cisco, I need you to vibe us to earth 38, Gideon, plot a course. Our friends need our help." She then turns to face everyone. Okay, so most of you know each other but some of you don't. I want everyone to raise their hand when their name is called so everyone knows who you are. Amaya. Zari. Nate. Ray. Mick. Barry. Iris. Cisco. Caitlin. Wally. Joe. Harry. Ralph. Cecile. Oliver. John. Laurel. Rene. Curtis. Quentin. Thea. Roy. Okay, now that's Ray's girlfriend Nora." Sara says pointing to Nora. Next she points to Nyssa "that's Nyssa. And this, as of last night, is my fiancé, Ava." Sara says, looking beside her. Before anyone could congratulate them. Sara looked to Felicity and Cecile, who were holding Jenna and Rose. "Would you like to introduce them." Sara asked. And the did. Felicity also introduced William. As soon an that was over, Sara headed to her Captain's seat with Ava right behind her, as many as possible would take the seats and Ava would stand next to her fiancé's chair. All at once everyone except Nyssa rushed up to congratulate Sara and Ava. Quentin got there first and gave his daughter and soon to be daughter in law great big hugs and congratulations, Laurel wasn't far behind.