I think you'd have to use a particularly dense lens to say there's almost nothing of value from Reggie's statements. I understand trying to keep expectations tempered, especially when the DLC will take all of 2019 and more to complete, but don't act like we hadn't gotten a DLC reveal to work with at all.
I want to highlight some other parts that people seem to overlook (and yes, they're word-for-word quotations). When someone says "this gives you a flavor about how we're approaching the DLC", it usually suggests that a direction is being taken, one whose general trajectory can be inferred based on whatever the example was (e.g. Joker). If the direction was really headed towards the likes of Edelgard/Melmetal/Crafted Yoshi when it was initially pointed at Joker, then that'd be a completely different flavor of DLC than what was first suggested.
"These are going to be characters that are new to the series, just like Joker from Persona 5." See, this is where people get the idea that we're getting totally brand new series in the first place: the fact that he immediately follows "new to the series" with "just like Joker", which would suggest that the newcomers would be about as new to Super Smash Bros as Persona is, a series that had no forthcoming beyond a Tokyo Mirage Sessions spirit. I don't know what twisted logic gets applied in this case, but that's not a comparison that applies to the likes of Mario, or Zelda, or Fire Emblem, or any series already immersedly represented in Smash.
"Characters that you would not anticipate to be in Super Smash Bros." How does anyone say something this without any idea of who people anticipate? Does someone simply say that and assume that people don't anticipate Bandana Waddle Dee or Waluigi, if characters like those two were really on the way? Does anyone say that and think that Sora and Banjo don't really have that big of an anticipation thread in the wings for them, if they knew those two were coming?
So to recap, that's three separate statements from Reggie Fils-Aime himself that suggest the same radical idea: that the DLC newcomers will not be characters that are conventionally expected for Smash, such as Joker from Persona 5. "Well, he's obviously overselling/doing PR/lying," some might argue. Right, like how Sakurai tried to tell us "not to expect too many new fighters" and that the rate of character reveals would slow down, but people chose to ignore those and ate up the Grinch hoax anyway. And that was to keep us from getting too excited.
No one in their right mind, let alone "I've cushioned Nintendo's poor decisions my whole life" Reggie Fils-Aime, would hype up the DLC using "Never Saw It Coming" Joker as the point of comparison if we were only going to get Edelgard-level reveals later down the line. Speaking from all the years that I've heard him talk in E3s and Directs, I've never seen Reggie as someone who's ever tried to mislead us or oversell us on how a game's content is going to turn out. He's always stayed honest about every Nintendo product that he's had to sell to us - if they're lacking, flawed, or not necessarily the GotY, he presents them simply as they are, using whatever's functional in them and Nintendo's best intentions as his arguments (which is all he really had to work with for many years). His job so much of the time is just trying to make everything look decent enough to be bought.
So whenever he gets something actually meaty to work with, he goes for it. He sells it up because it's worth it. When he says to get hyped for Breath of the Wild, Super Mario Odyssey, or the mysterious NX, he means it. Reggie knows what real substance looks like, and he would not suggest that the following DLC would be Joker-level reveals if they were not even comparable.
There's plenty of reasons why lots of people are trying to twist the direction back towards home-country Nintendo, but if you're really convinced we'll still be getting Waluigi or Geno after the direction Joker's taking this DLC pass, you're probably setting yourself up for a rude last surprise.