Likely Not In Smash Ultimate (Part 1) - Ray, Travis Touchdown, Zack & Wiki, Isa Jo & Kachi
This took quite some time to make.
For some characters I found a few other reasons for/against their inclusion, but I didn't put them in the video because of several reasons (time and ressource restraints, not wanting to make a long video, equal amount of reasons for each character).
Please keep in mind that I'd love to see any of these characters in Super Smash Bros. Ultimate...but if YouTube smashed some of those "Leak" videos on your screen aswell (without asking you if you want them in the first place), then you should know what I'm talking about.
There are a number of characters that get more exposure on YouTube through those videos than other characters. This automatically popularises certain opinions/theories and therefore some characters (like Skull Kid or Geno) seem to be more popular in 2018 than others (like Shantae or Travis Touchdown).
Anyway, here are the sources and some additional thoughts (sometimes I have two for the same information, just in case):
SHANTAE
WayForward asking readers who would like to see Shantae in Super Smash Bros. to vote for her in the ballot:
--- https://mynintendonews.com/2015/04/04/wayforward-really-wants-shantae-in-super-smash-bros/
--- https://www.kickstarter.com/projects/1236620800/shantae-half-genie-hero/posts/1187315
--------------------------------------------------
TRAVIS TOUCHDOWN
Suda51 let some of his sound staff help with the sound of Super Smash Bros. Brawl, that's why he is mentioned in the credits under the "Special Thanks" section
--- https://www.youtube.com/watch?v=OGmACelA2sA
5:45 - 6:00
Link for information above & Suda51 saying that he talks with Sakurai about games whenever they meet:
--- https://www.sourcegaming.info/2017/05/26/straight-from-the-source-goichi-suda-no-more-heroes/
Suda51 mentioned a few times that he'd love to see Travis in Super Smash Bros.
--- https://nintendoeverything.com/suda51-talks-a-bit-more-about-switch-wants-travis-touchown-in-smash-bros/
--- https://www.eventhubs.com/news/2018/apr/12/suda51-talks-about-chances-seeing-travis-touchdown-next-super-smash-bros-game-nintendo-switch/
Suda51 delayed Travis Strikes Back: No More Heroes so it won't effect Super Smash Bros. Ultimate sales (I think that Smash Ultimate would effect sales of Travis Strikes Back and not vice versa. However, I see Suda51's act as a sign of respect towards Sakurai)
--- https://nintendosoup.com/suda51-travis-strikes-again-was-delayed-so-it-wont-affect-super-smash-bros-ultimate-sales/
--- https://www.destructoid.com/suda51-has-a-great-reason-for-pushing-travis-strikes-again-into-2019-520831.phtml
--------------------------------------------------
ZACK & WIKI:
Producer Hironobu Takeshita is interested in making a sequel to the game:
--- https://nintendoeverything.com/zack-wiki-producer-interested-in-making-a-sequel/
--- http://www.nintendolife.com/news/2012/04/zack_and_wiki_producer_interested_in_sequel
A fan/user posted a potential moveset for Zack & Wiki on Gamefaqs in 2009:
--- https://gamefaqs.gamespot.com/boards/928518-super-smash-bros-brawl/46955818
--------------------------------------------------
ISA JO & KACHIi:
Sales figures for both Sin & Punishment games
--- http://www.vgchartz.com/db/game.php?id=12696
--- http://www.vgchartz.com/game/27354/sin-and-punishment-star-successor/
Fans/users talking about which protagonist they would like to see in Super Smash Bros. (Isa Jo or Saki Amamiya):
http://www.ign.com/boards/threads/ssb4-question-isa-jo-vs-saki-amamiya-for-sin-punishment-rep-who-should-it-be.452803883/
Pit was a trophy in Melee and became playable in Brawl.
Little Mac was a trophy and an assist trophy in Brawl and became playable in Smash Bros. for Wii U & 3DS.
Saki Amamiya is also an assist trophy and a trophy in Brawl and Wii U / 3DS. Could this mean that he'll be playable in Super Smash Bros. Ultimate?
--- https://www.ssbwiki.com/Pit
--- https://www.ssbwiki.com/Little_Mac
--------------------------------------------------
Since YouTube has a limit for tags (I don't know why, probably to fight videos that link to malware or virus sites and that spam tags), I have to dump mine here - sorry in advance:
Bradevit, Super Smash Bros. Ultimate, Likely Not In Smash Ultimate, Here Is Why, Part 1, Ray, Raymond Bryce, Disaster, Day of Crisis, Dizasutā Dei obu Kuraishisu, Travis Touchdown, No More Heroes, Desperate Struggle, Nō Moa Hīrōzu, Desuparēto Sutoraguru, Zack & Wiki, Quest for Barbaros' Treasure, Takarajima Z, Barbaros no Hihō, Isa Jo & Kachi, Sin & Punishment, Successor of the Skies, Star Successor, Sora no Kōkeisha, Nintendo Switch, Masahiro Sakurai, Shantae, Shovel Knight, Ken, Street Fighter, Echo Fighter, Saki Amamiya, Monolith Soft, Grasshopper Manufacture, Capcom, Treasure, Suda51, Suda Gōichi
Other Videos By Bradevit
Other Statistics
Super Smash Bros. Ultimate Statistics For Bradevit
Currently, Bradevit has 16,648 views for Super Smash Bros. Ultimate across 25 videos. Less than an hour worth of Super Smash Bros. Ultimate videos were uploaded to his channel, roughly 3.15% of the content that Bradevit has uploaded to YouTube.