Even if the journal isn't displayed publicly on the site, it can be accessed by users. How would users access a journal that isn't displayed publicly? Or do you mean to say that all registered users for the journal will have access to the journal if they are logged in? Please, explain?
Perhaps a Frontpage Plugin, which will allow an OJS administrator to select what they want to appear on the main OJS homepage.
If someone publishes multiple journals, it would be helpful if there is a way for them to organize their main OJS homepage via a plugin. For example, a user can decide which journal (s) to feature on the homepage, which articles to feature on the homepage, which TOC from the desired journal to feature on the homepage, recently published articles on the homepage (can determine how many to show), news and announcements, and a browse link to all the journals all from the homepage.
Is this possible as a feature?