Ok, I think I just figured out how this works : r/FortNiteBR
Henchmen Skin Concept: 1 skin (5 edit styles), each unlocked by completing a secret challenge. They would be the true secret skins of Chapter 2 Season 2. Unlike Deadpool, who's very cool,
Fortnite's Secret Neymar Jr. Skin Leaks, With All Four Styles [Update]
All Fortnite Season 9 Mystery/Secret Singularity Skin Styles Leaked - Fortnite Insider
Category:Secret Skins - Fortnite Wiki
How to to get the secret Fortnite White Scientist skin style | PCGamesN
Every secret skin from this Chapter. (So far) : r/FortNiteBR
How to Unlock the Superman & Clark Kent Secret Fortnite Skin - Fortnite Insider
Chapter 2 Season 6 Battle pass secret skin : r/FortNiteBR
All secret styles in Chapter 2 Season 6 of Fortnite - Fortnite Battle Royale
Evolution of All Secret Skin in Fortnite (Chapter 1 Season 4-Chapter 2 Season 5) - YouTube
First-look at “secret skin” leaked for Fortnite Chapter 2 - Dexerto