Yeah Lila will still be upset about not being a superhero and when the real Volpina shows up, she's gonna get angry and Hawkmoth comes in and she turns into Volpina again and full blown out battle of illusions and we all know who's going to win.
Ooh, this sounds really interesting! Something to point out though is what Alya said when she turned into lady wifi, "I'll expose the lies of anyone who covers up the truth! Sign me up!". This sounds like Alya/Rena would try and hunt out Lila aka fake Vopina out, and make her pay for what she did. I'm pretty sure that I saw a fanart of a showdown between the two once.