Ah, the things the internet discovers. Someone was looking through old Famicom Disk System materials, and they found an image that showed off pre-release cover art for The Legend of Zelda. What ended up being used for launch is different from this art, but artist Mr Talida took the time to recreate an HD version of that art from the tiny preview image.
Good find! Here's my recreation. pic.twitter.com/5AkjJyLZDu— MrTalida (@MrTalida) January 9, 2019
Thanks to Kao for the heads up!