Interesting points, though I gotta say that even if the no AT promotions thing were to be true, Shadow could still get in as a playable fighter if they were to add his Boom incarnation.
That, or if they really wanted to, they could add in Shadow android, or retcon the Assist to be the Shadow android this whole time, but Adding Boom Shadow would really be adding in Vegeta the Hedgehog (from the Sayian/Frieza Saga)
You are REALLY determined to convince us Shadow still has a chance, aren't you?
I'm just trying to say my piece, because if Shadow does get in, I don't want to hear no one say that he was completely unexpected (Granted I won't care, because I'd be too hyped for Shadow being in the game)
Personally, I've felt that there's always been an agenda against Shadow the Hedgehog in this Speculation Community.
-People only saying he can be an Echo Fighter, when he has all the merits to be his Own character, and Alot of unique moves and properties he can bring
-People not even giving Shadow the time of day when listing realistic Assist Promotion characters, but will list Shovel Knight, Isaac, and Alucard, when Shadow can be argued to be more recognizable than even Sephiroth, and is very popular character
-Saying there's no reason to have Shadow over Tails or Eggman, when even people that have worked with Sonic (Aaron Webber being an example) saying that Shadow & Knuckles make sense as the 2nd character
It's just been infatuating to deal with. I've heard it from Here, Gamefaqs, Discord, etc. I've heard it from Papagenos, Fatmanonice.
I'm fine if you expect other characters, or if you expect Eggman or Tails over Shadow, since there is good reasons why they could get in over Shadow and such, and with hundreds of characters with their own merits, It's hard to just settle on just 2 characters. but I think it's the fact that make it seem that there's no reason he has to be added, or that he'd never be added on his own merits
Some of the same people that don't believe that Assists deconfirm, will tell me that Shadow is very unlikely, but they have only gave reasons that are able to be counter argued with some Logical Explanations. I've done this in the past in my Essay as an example, which you can read in the Sig
You can't argue that Shadow is unlikely from a Character merit standpoint. Shadow is
-Recognizable
-Very Popular, in terms of requests and in the Sonic fanbase itself
-Relevant
-Has Unique moveset potential, not just from Sonic, but from the rest of the Smash cast
-Should be able to be implemented in Smash
-Ease of Access, thanks to Sega and how they like Licensing out Sonic
I've countered the Assist Argument, I've countered the "Only as an Echo arguement", and Comparisons to Eggman and Tails is up to Interpretation of which one you feel is likely, but there is real evidence that Shadow should at least be in the discussion
I will acknowledge though that some of the theories I've made are "Off the wall", but that shouldn't subtract for the stuff that Shadow does have in his favor that's factual. that's just my Piece