AN: Just a little background info, Laurel did not die when Darhk attacked her, since Oliver noticed that someone, who he now suspected to either be Chase or Helix, messed with her machines and thus was able to prevent an embolism from forming, but killed Darhk nonetheless. Flashpoint still happened and Laurel is now a meta with a sonic scream because of it, though it is not why she is alive, Thea rejoined the team after dealing with Prometheus, and since Laurel is still alive, Dinah was never recruited to the team, Oliver and Laurel are dating and William loves having Laurel in his life, since she filled the role of his mother quite nicely, though everything else is more or less the same.
And now, the Rewritten version of Crisis on Earth X:
Oliver had just returned to the bunker after dealing with a ninja problem in the city when he noticed his girlfriend Laurel Lance waiting for him.
"Did I forget something?" Oliver asked.
"We still need to RSVP to Barry and Iris's wedding." Laurel said.
"Of course we're going." Oliver said, offended that anyone would think he'd miss one of his closest friend's wedding.
"I figured, but still." Laurel said.
"Raisa is all set to watch William while we're gone." Oliver said.
"Great, then let's get going, Felicity has already left." Laurel said.
"Yeah, kind of surprised John wasn't invited." Oliver said.
"Well, I guess someone has to keep an eye on the others while we're gone." Oliver said and Laurel nodded as she checked the going box of the RSVP card.
Now in Central city, Iris, Caitlin, Felicity, Laurel and Kara were all in a salon, having a spa day.
"Iris, you are really glowing." Laurel said to the bride.
"Aw." Iris said.
"Wait, it's pregnant women who glow, brides blush." Caitlin corrected.
"Right. Blushing bride I can do, the other one, not just yet." Iris said.
"Oh, It doesn't get better than this, ladies." Felicity said.
"I know. It feels so good to just be away from it all." Kara agreed.
"- Where's Mon-El?" Iris asked.
"You know what? It's a long story, but thank you for letting me bring my sister as my plus-one." Kara sighed.
"Yeah. Absolutely. I'm actually really excited to meet her." Iris said as the file the stylist was using on Kara shorted out.
"Uh Oh, I'm sorry. I should have warned you. I take a lot of keratin. - Super strong nails." Kara covered.
"- So, um, you and Oliver?" Iris asked Laurel.
"What?" Laurel asked.
"You guys next, you think, to walk down the aisle?" Caitlin asked.
"Maybe once the city is not being attacked and Oliver is no longer under indictment and he's spent enough time with his son who is still mourning the loss of his mother." Laurel said.
"- So, any day now." Felicity said.
"- Any day now. But even so, considering the last time I brought anything even remotely related to getting married up to Oliver, he took my sister on the Queen's Gambit, so now, I'm waiting for him to bring it up." Laurel said Iris nodded.
"Well, cheers, Iris, to your big day." Kara said.
"To your big day." all the ladies said as they held out glasses of champagne, except for Laurel, who just had water.
"Cheers." they all said.
"- Thanks, girls. - Cheers to you." Iris said.
"You know, I mean, I've been in love with Iris since I was ten. How am I supposed to fit all that love into one vow? I've already written 38 pages, single spaced." Barry said to Oliver as they got fitted for tuxes at a tailor.
"You could always speed-read it." Oliver suggested as he came out from the changing area.
"No, no one would understand me. I don't know what to do, man, I need help."Barry said.
"Barry, when you're up there, - and you look into her eyes - Damn. the words will come. And if they don't, the look on your face will tell her everything that she needs to know. You clean up nice, my friend." Oliver said.
"Thanks. Yeah, you, too." Barry chuckled.
"I can't believe you're really doing this." Oliver said.
"Yeah, man. What can I say, I got the girl. And, so did you. You ever think about making it official?" Barry asked.
"The last time I tried to get married, it all fell apart." Oliver said, referring to his romance with Felicity.
"Still, it's a different girl this time and let's face it, you've been in love with Laurel just as long as, if not longer, than I've been in love with Iris.
"Still, I think that with everything going on right now, it's just not the right time." Oliver said.
"- You love her?" Barry asked.
"- I love her so much." Oliver confirmed.
"Put a ring on her. People like us are always going to be getting into trouble, right? Having someone we love by our side just makes getting out of that trouble that much easier. We have something to fight for," Barry said before sighing, "If I can have my happy ending, so can you. I promise."
"I'm supposed to be the all-knowing mentor." Oliver joked.
"I have been known to catch up." Barry said with a grin and Oliver barely even chuckled at the joke.