How to add extra arguments to ggplot2 theme?

I'd like to create a script specific theme for some ggplots I'm producing. I plan to have a set custom theme that allows me to make some adjustments if needed using the three-dot notation .... Something like this.

theme_script <- theme(text = element_text(color = 'black'), 
        panel.background = element_blank(), 
        axis.line.x = element_line(color = 'black'), 
        axis.ticks = element_blank(), 
        plot.margin = margin(.5, .5, .5, .5, 'cm'), ...) # dot notation

Then I could use thescript_theme for things like.

plot + 
theme_script(text = element_text(size = 25))

But I'm getting this message Error: '...' used in an incorrect context. Is there a better approach to accomplishing my goal?