Since we're talking about the probability of a Smash port, is there anyone here who DOESN'T want to see Smash Wii U ported to Switch? I understand why people would want it, but I'm not really holding my breath for it. There has been so much going on with Nintendo since the release of Smash Wii U in November 2014. We got Splatoon, BotW, Odyssey, Sun and Moon, Xenoblade 2, Kirby Star Allies, and the announcement of Prime 4, Pokemon Switch, and FE Switch. If Nintendo were to release a port now, there's just no way they'd be able to represent all of that. At best, we'd probable get about 3 characters and a couple of new stages. By the time the next real Smash game comes out, it could be close to the end of the Switch's lifespan, meaning that the time between Smash Wii U and Smash Switch would be the longest gap between Smash releases.
I don't know about you, but that's an awfully long time to wait for Smash.
I wouldn't want a port. The content would be too outdated. Since Smash 3DS/WiiU, we've seen releases for:
Mario
Mario & Luigi: Paper Jam (2015)
Paper Mario: Color Splash (2016)
Super Mario Run (2016)
Mario Sports Superstars (2017)
Mario + Rabbids Kingdom Battle (2017)
Mario & Luigi: Superstar Saga + Bowser’s Minions (2017)
Super Mario Odyssey (2017)
Mario Tennis Aces (2018)
(Not sure about it mattering about new sports titles releasing)
The Legend of Zelda
Tri Force Heroes (2015)
The Legend of Zelda: Majora's Mask 3D (2015)
The Legend of Zelda: Breath of the Wild (2017)
(There have also been 3 separate release for Hyrule Warriors, but I doubt we'd see any content from those)
Kirby
Kirby and the Rainbow Curse (2015)
Kirby: Planet Robobot (2016)
Team Kirby Clash Deluxe (2017)
Kirby's Blowout Blast (2017)
Kirby Battle Royale (2017)
Kirby Star Allies (2018)
Metroid
Metroid Prime Federation Force (2016) (I can't believe I'm acknowledging this one...)
Metroid Samus Returns (2017)
Metroid Prime 4 (2019?)
Donkey Kong
Donkey Kong Country: Tropical Freeze (2014)
Donkey Kong Country: Tropical Freeze (2018 EP)
Fire Emblem
Fire Emblem Heroes (2017)
Fire Emblem Echoes: Shadows of Valentia (2017)
Fire Emblem Warriors (2017)
Fire Emblem [tentative title] (2018?)
Yoshi
Yoshi [tentative title] (2018)
(I didn't add Poochy + Yoshi's Woolly World here as there's a Yoshi's Woolly World stage in Smash WiiU)
Splatoon
Splatoon (2015)
Splatoon 2 (2017)
Star Fox
Star Fox Zero (2016)
Star Fox Guard (2016)
Star Fox 2 (2017)
Pokémon
Pokémon Omega Ruby (2014)
Pokémon Alpha Sapphire (2014)
Pokémon Rumble World (2015)
Pokémon Sun (2016)
Pokémon Moon (2016)
Pokkén Tournament (2016)
Great Detective Pikachu (2016)
Pokémon Ultra Sun (2017)
Pokémon Ultra Moon (2017)
Pokkén Tournament DX (2017 EP)
Pokémon [tentative title] (2018?)
Pikmin
Hey! Pikmin (2017)
Xenoblade Chronicles
Xenoblade Chronicles X (2015)
Xenoblade Chronicles 2 (2017)
Just a hand full.
EP = Enhanced Port