This just in, we have yet ANOTHER update on the Universe representation count, and its a large one:
1) We can now confirm the following Universes from past Smash games will be represented in Smash Ultimate: Pandora's Tower (via Aeron and Elena being spirits), Trace Memory (via Ashley Robbins being a spirit), Zangeki no Reginleiv (via Frey and Freya being a spirit), Sennen Kazoku (via Cupid being a spirit), Cubivore (via Pig being a spirit), Famicom Detective Club (via Ayumi Tachibana being a spirit), and Rusty's Real Deal Basebal (via Inuji Darumeshi returning as a Spirit). That seven more universes added on to the ones already confirmed.
2) We can confirm the following 3 Universes getting Smash representation for the first time: Napoleon, FlingSmash, and Sushi Striker.
With this, 1080°, After Burner, AR Games, bit Generations, BIT.TRIP, Chōsōjū Mecha MG, Doshin the Giant, English Training, Flower Town, Fluidity, Freakyforms, HarmoKnight, Ice Hockey, Magical Vacation (also known as Magical Starsign), Mii Force, NES Remix, Sakura Samurai, Slide Adventure MAGKID, Soccer, Thru, Warrior's Way, Wave Race, Wii Play, and X are the only Minor Universes from past games still unaccounted for, while Clu Clu Land, Dig Dug, Drill Dozer, GoldenEye, Kururin, Perfect Dark, Steel Diver, and Xevious are the only former Secondary Universes still unrepresented Smash Ultimate.