I don't want to discourage the author, either, but I'd like to suggest that she do some basic research into how civil litigation, specifically defamation lawsuits, proceed.
Because with what you have now, there would have to be a vast conspiracy including Mr. Stern, the Judge, the DP's lawyers, the Clerk of the Court, and a number of other parties besides the mini-mart people; otherwise Lois and Clark and Perry and etc. would be able to see the Complaint (lawsuit) that was filed, which would have to contain an explanation of exactly what, when, where, and how the DP defamed the mini-mart (issue #, article, why it isn't true and how it damaged their business), and precisely how they arrived at $300,000,000 as the amount of lost business and any other monetary damages they suffered as a result of this article.
Maybe that is where you're going. But I'd also like to suggest that Perry White, as an experienced newspaper editor, would *have* to know all of this already, and it would be very surprising if Lois and Clark didn't also.
It just doesn't work for me. But I'm suspending judgment. Maybe you can make it work. I don't know what's coming down the line. It's a nice idea to strand the characters away from the DP resources, with only their own research skills to rely on; I'm just not sure this way of getting there really works.
Good luck with it.