DOOM’s Doom Slayer is coming to SSBU, but not as a standalone character. The icon will appear in the game as one of the last SSBU Mii Fighter costumes. It will appear alongside Octoling and Judd costumes from Splatoon. They will show up on October 18, 2021. Each one will cost $0.75.
The Octoling and Judd Splatoon Mii Fighter items aren’t full outfits. Rather, they are a wig and hat, respectively.
The Doom Slayer is a full costume, however. This Mii Fighter SSBU outfit is for a Gunner type of character.
Super Smash Bros. Ultimate is available for the Nintendo Switch. The SSBU Doom Slayer and Splatoon Mii Fighter outfits will appear on October 18, 2021.