I think imagination is boundless and pjsk cast can easily be inserted into revue universe especially since every unit have their own passion for a certain type of art or performance. Leoneed's love for music and seeing music and a unified language that connects people could be easily retrasnalted on theater. Wxs dont even need any special additions. Mmj and vbs could easily work as "i want to be this type of stage girl" aspirations, sorta what Mahiru and Kaoruko have. Only weird ones are niigo ehwysgwueev. Like the love for their craft isnt very much of a theme for their unit (its only relevant for ena and her personal arc) so idk really if they fit. Well mafuyu can be burned out child star that lost her passion for theater. Would be cool. And shes the one who got on Stage of Fate