The reveal of Rosalina has given me renewed hope for the actual possibility of the Happy Mask Salesman having a shot. Looking at a marketing perspective, Nintendo has been shoving Rosalina in everything they can lately, with Smash Bros being the ultimate hype bringer for any character. Nintendo has also been hinting heavily at a Majora's Mask remake, with multiple vague quotes, many references in A Link Between Worlds (including the mask itself hanging on Link's wall), and even Skull Kid being the first shown assist trophy for SSB4. It may be probable that the Salesman could enter the fray and be shown when they decide to reveal the MM remake, with Skull Kid not making the cut, the Salesman is the next logical choice. He would provide a very unique moveset whilst being a "WTF" character, as Sakurai seems to enjoy adding. /shameless propaganda.