There is a lack of a lot of Street Fighter content that isn't from 2
That argument kinda tires me. Yeah, there's not a lot of stuff from games other than II, but you don't see people complaining about the fact that Fatal Fury has very little content due to most of the spirits and songs being from other SNK IPs, do you?
Or the lack of a Rock Howard spirit despite the fact that he's a very popular character in the SNK fanbase, to the point where people outright popped off when he was announced as DLC for KoF XIV. Or Nakoruru not having a cameo on the KoF stage despite being playable in a KoF game and arguably the second company mascot alongside Terry.
And those are just examples from Terry, showing that even though he brought a lot, there's still some glaring omissions. I could also talk about how Persona 5 could've had more songs, or Dragon Quest only having MIDIs, or Sonic not having any remixes beyond that one Angel Island remix from Brawl. And so on...
Third-parties will sometimes have weird things about their representation, it's not exclusive to Street Fighter. So why aren't other series getting focus?
Heck, not a lot of people speculated a Final Fantasy character despite the franchise's absolutely abysmal content because of the self-assumed notion that "Square stingy", so people zeroing their sights on Street Fighter kinda annoys me because it really feels like they only think about it because a stranger of 5chan mentionned the series.
I literally never saw that argument of SF having lacking content until Sephiroth was revealed, and I doubt the timing of this argument showing up is a coincidence, because the Chun-Leak got traction some time after that.
as well as a Chun-Li theme remix which you would think would be one of the next songs to be remixed for SF because she's such an iconic character.
They did Guile's Theme tho, which is such a meme move that I don't even mind no Chun-Li remix lmao
The Namco roulette also even manages to include a Heihachi sprite but no Lloyd sprite despite both characters being Namco costumes in the last game (a bit of a stretch).
A stretch indeed because I could use that same argument for Nightmare, a character who hasn't popped up in those leaks.