Square trademarked "Seiken Densetsu" in 1989, intending to use it for a game project subtitled "The Emergence of Excalibur", and led by Kazuhiko Aoki for the Famicom Disk System. According to early advertisements, the game would consist of an unprecedented five floppy disks, making it one of the largest titles developed for the Famicom up until that point. Although Square solicited pre-orders for the game, Kaoru Moriyama, a former Square employee, affirms that management canceled the ambitious project before it advanced beyond the early planning stages. In October 1987, customers who had placed orders were sent a letter informing them of the cancellation and had their purchases refunded. The letter also suggested to consider placing an order on another upcoming Square role-playing game in a similar vein: "Final Fantasy".