After months of preparation, Epic Games will finally take on Apple in court in a trial that could fundamentally change the makeup of the App Store. The fight dates back to August, when Epic added a direct payment mechanism to its hit battle royale game Fortnite in violation of Apple’s rules. The iPhone maker quickly removed the game from the App Store, and Epic responded shortly after with an antitrust lawsuit aiming to establish the App Store as a monopoly. The case will finally be…