Nintendo has updated the Smash Bros. Ultimate website with mention of a Special Edition for the game, with retail listings confirming its existence shortly after.
The Special Edition, as it has been labeled on the site, appears to include a Super Smash Bros. Ultimate steelbook and a Smash-branded Pro controller. The controller has white-colored grips and bears the Smash Bros. logo on the front.
Nintendo has also previously announced that the game will be compatible with the Wii U’s Gamecube controller adapter and another line of Gamecube controllers also bearing the Smash logo on the front. The company has yet to actually officially announce either the Pro controller or special edition.
Super Smash Bros. Ultimate releases on December 7 on Switch.
Source: Game Informer Super Smash Bros. Ultimate Limited Edition Shown Ahead Of Announcement