Miraculous and The Flash crossover: Collision of Worlds. (Book 4)

As he slept, Barry sees multiple visions of things that happened on Ladybug's earth. Heroes day, Scarlet Moth, Chat Blanc, Miracle Queen, and the destruction of Paris, for some reason. But they all seem to be fuzzy, and in a rapid blur. And he couldn't explain why.

When Barry finally wakes up, he sits up, slightly rattled. He takes a look around, scratching his head. And realized he was in Zoe's bedroom, on the hideaway bed. Wearing some spare pajamas Zoe gave him.

Barry: What am I– Oh, right.

Now, Zoe walks up to the hideaway bed. Wearing a t-shirt, and pajama bottoms.

Zoe: Hey, you're up. Sleep well?

He gets up.

Barry: (Yawns) Tried to.

She sits down next to him.

Zoe: Oh, no. Did you have a bad dream, Barry?

Barry: Something like that. It-It was like I was seeing the past, present, and future. All at once.

Zoe was surprised by this.

Zoe: What exactly did you see?

Barry: Paris on Heroes day, your sister being akumatized, a white-clad version of Cat Noir. And all of Paris burning. I'm not entirely sure, myself.

This unnerved Zoe, slightly.

Zoe: O-kay. That's…slightly odd. Well, I'm going to get ready for today. I won't take long.

Barry nods, as Zoe heads to the bathroom, and closes the door.

The second the door closes. Barry looks around and quickly changes into his everyday clothes. Which were conveniently washed and cleaned for him.

(WHOOSH!)

Barry: Huh, sweet. Thank you, room service.

He looks around Zoe's spacious room. Thinking to himself.*

*Barry: “This is a nice bedroom Zoe has. It's quaint. Guess Chloe really wanted to make Zoe feel welcome.”

He inspects around Zoe's bed. The corner of a picture frame barely poking out from her pillow.

*Barry: “Hmm. Hello, what's this?”

He picks up the picture frame and turns it over. Revealing a picture of Marinette.

*Barry: “Huh. Well, that's weird. Why would Zoe have a picture of Marinette under her-?”

Barry stops as the realization hits him.
He begins to put the pieces together.

Barry: Oh.

He looks up, as he hears the bathroom door knob turning. And quickly put the picture frame back.

Now fully dressed, Zoe exits the bathroom.

Zoe: Okay, ready to head down to breakfast, Barr?

She sees Barry sitting on the couch, watching the TV.

Barry: Oh, yeah. Of course. I was just checking to see what's on TV this morning.

He flips to another channel, covering the brawl between Ladybug and Flash, last night.

Nadia: “--Thanks, Clara. And our top story, today. The resulting aftermath of a brawl, between Ladybug and The Flash, yesterday evening. The two engaged in some sort of quarrel, after encountering an unusual female version of the supervillain, Hawk Moth. Viewer discretion is advised.”

*Barry (TB): "Uh, oh!"

Zoe and Barry watch the footage of the battle last night.
Ladybug punches Falena Falco and then cuts to her fighting against Flash.

Nadia: “This was the scene after Ladybug violently attacked this female Hawk Moth. Nobody is certain what provoked this conflict between Ladybug and The Flash. But when asked, Cat Noir had confirmed that the villainess in question was a definitive threat to Paris' safety.”