I'm having thoughts of Adrien being akumatized as Volpina's replacement, except his lies are mich more believable, much more thorough.
Lila as Volpina made illusions of missiles coming at heroes out of nowhere, but if it was Adrien's dramatic ass, you better believe there would be fighter jets of some super-duper secret and evil organisation like in Bolt movie who's goal would be to get the miraculous before Hawkmoth.
Suddenly Volperouge is not suspicious, but a another holder that arrived at lucky time.
He could be found out if Hawkmoth makes him get Ladybug to surrender her miraculous like Lila did, but here it could also be much better. Volperouge holds Adrien Agreste (illusion) hostage because he's dear to Ladybug. He demands her miraculous for his life, but when someone points out that it could be an illusion, he drops him.
Ladybug jumps to save him in fear, but when she touches Adrien, he dissapears cause he's a fake, the real one is still on top with the akuma.
When she says that he's bluffing and would never threaten real Adrien, he dangles "real" Adrien right above her by the leg, which is when she's hit by the stuff falling from his pockets: his phone, some change, a wallet, and most importantly her lucky charm.
Suddenly when Volperouge start to let go one finger at a time she's not so brave anymore and the Ladybug miraculous is almost taken, but heroes some-fucking-how save the day yet again.
This would make for AMAZING "Prepare for the trouble! And make it double!!" situation when like on Heroes Day every akuma victim is akumatized again and it's Volperouge and Volpina outright bending the reality with their illusionary powers.
Maybe instead of focusing on Ladybug and other holders, they go straight for Marinette to torment her by letting her think they might know she's Ladybug when in reality they absolutely DO know she's Polka-dotted Bug Hero.
So she's desperately trying to prove to these super-powered villains that she's not in fact the Saviour of Paris and them looking at eachother with "Is she for real rn?"