I don't have access to the official script for the John Wick: Chapter 5 trailer. However, I can try to write a fictional script for a hypothetical John Wick 5 trailer based on the franchise's previous films. Keep in mind that this script would be purely imaginative and not official:
[Opening shot of John Wick walking in a cityscape]
Narrator (in a deep voice): "The Boogeyman is back."
[Cut to a montage of John Wick taking down enemies with his signature moves]
Narrator: "John Wick, the legendary hitman, has returned for his most personal vendetta yet."
[Cut to a shot of a new villain, a ruthless assassin]
Narrator: "But this time, he faces his most formidable foe, one who will stop at nothing to destroy everything John Wick holds dear."
[Cut to a shot of John Wick looking determined, with his iconic gun in hand]
Narrator: "The battle for vengeance has begun. The war for redemption will follow."
[Cut to the title card: John Wick: Chapter 5]
Narrator: "John Wick: Chapter 5. The Boogeyman is back, and this time, it's personal."
[End screen with the release date]
Please note that this script is purely fictional and not official. The actual trailer script may differ significantly.