Probably not. I don't like using screenplay software for writing comic books because comic book scripts have special needs that those apps don't cover. And that goes both ways. Screenplays have special needs, and working on them would take my attention away from working on the comic book features. I would much rather have the best comic book writing software available than an app that's mediocre at writing both comic books and screenplays.
There is already an abundance great screenplay software available. I'm partial to the Fountain syntax, which is supported by dozens of free and paid apps: https://fountain.io/apps
That said, when Superscript is live and in the hands of happy users, I will consider adding features such as screenplay formatting. But only once Superscript is stable.