While I agree there will be a new pokemon rep, I can't believe everyone is so set in stone on it being Incineroar. Vergeben himself said he wasn't too confident in the validity of that claim. I still think the door is wide open when it comes to potential characters.
Just goes to show how much people are fools for Vergeben these days.
Well it makes sense, you see, every Pokemon in Smash had a prominent role in the Anime at one point.
Pikachu is Ash's Signature Mon and the Star of the First Few Seasons Of The Anime
Jigglypuff was a running Gag character and She was pretty popular because of it.
Squirtle and Charizard were also prominent Anime Mons. Ivysaur was probably added so that the three evolution stages could be represented
Pichu had a prominent role in a Short played before the Third Pokemon Movie. (A movie which released in Japan at about the Middle of Melee's Development)
Mewtwo was the main Antagonist of the First Pokemon Movie, Which released the year before Melee's Project plan was Finalized.
Lucario was chosen because he had a prominent role in the Eighth Pokemon Movie that was released around the same time that Brawl's Roster was chosen
Greninja was likely chosen because the Pokemon Company wanted him to be The Star of the Kalos season of the Anime. Sure enough, Greninja became Ash's Main Mon in that season.
At this point, I'm pretty sure the Gen 7 Mon will be Pokemon that is or will be prominent in The Sun and Moon Season of the Anime
Here Are the most likely Candidates:
Lycanroc Is One of Ash's important Mons in this season
Inicineroar seems very likely because Ash's Torracat (Who used to be a Litten) Is basically the main Pokemon of the current season and is very likely going to evolve into Incineroar.
Rowlett (Not Decidueye, just Rowlett) Rowlett is another one of Ash's Mon in the current Season. (But honestly, I doubt it's him)
Zeraora was a key Pokemon in the Twenty First (Yes, There are that many) Pokemon Movie
Out of all of these, Incineroar is Clearly the most likely in my opinion