Here are character trailers #21-40 from the Super Smash Bros. Ultimate official website! These characters mainly encompass Fighters who joined in Melee or Brawl.
Things confirmed: Divine Decree (Ablaze) remix BGM
Things confirmed: Two hit side smash like regular Link’s, Termina Field remix BGM
Things confirmed: Sword-using Smash attacks that look like Ike’s, Find Mii/Streetpass Quest Stage in HD
Things confirmed: Flare Blade neutral special can be reversed, Lyn assist trophy returns, Beyond the Distant Skies remix BGM
Mr. Game & Watch
Zero Suit Samus
Things confirmed: Shoulder barge dash attack
Things confirmed: New Final Smash, Shadow Moses Island stage returns
Things confirmed: Eruption normal special has two additional pillars of flame when fully charged
Things confirmed: Burrowing Snagret assist trophy
Things confirmed: Super Mario Bros. 2 stage returning, Knuckles assist trophy
Things confirmed: Gordos can be inhaled
Super Smash Bros. Ultimate is coming to Nintendo Switch on December 7, 2018.