Final Fantasy VII Remake will only include a portion of the entire story from the original game, taking place solely in Midgar. Considering how small that portion is in the original, it's led many to wonder about how Square Enix plans to flesh it out more in its Remake. According to game co-director Tetsuya Nomura, that won't be an issue.
Speaking to Famitsu (translated by Dualshockers), Nomura mentioned how he and his team prioritized quality content over quantity, with some side content being cut. "At the beginning, the development team readied even more content, but we wouldn't have been able to do everything without cutting corners, so we prioritized quality," explained Nomura. "We wouldn't have been able to finish the game otherwise."
Nomura mentioned that this new side content is as large as the main story, but it's unclear whether he was referring to individual mission sizes or the overall time it will take to complete either. In a separate interview with 4Gamer (also translated by Dualshockers), Nomura also mentions that main story quests have been expanded upon too, giving characters more depth in the process.