Against DQ:
It’d just make SE way too much money compared to what Nintendo would get. Think about it. Smash creates and revives franchises, and having a DQ character is basically directly advertising to your target audience and getting them excited. SE could actually PAY Nintendo money to include DQ and still end out way on top from the deal. Would Nintendo want to promote another franchise like that? It’s not like FF or something that doesn’t need revival or promotion.
Against Crono:
I have never really seen a demand from Crono until seeing him in this thread a couple days ago. He just wouldn’t get in over Geno. They’re in the same genre that’s the same age and never appeared again after. He really doesn’t serve any kind of historical purpose either, not compared to Geno at least.
Against Sephiroth:
Why add another FFVII character instead of a different FF character or monster or something? And the whole music and stage bit.
Against Geno:
I’m just not confident Nintendo is capable of understanding its fans (unlike Sakurai). Lately my supporting example has been Super Mario Party, which does not have an online mode for the full board game. Like, they could have rereleased Mario Party 1 and just made it online-capable (the full board game, not just mini games), and people would have loved it. There’s literally no reason I can fathom why they wouldn’t make it online-capable. They clearly have the ability, and the want exists, and it would improve the game. But they inscrutably just won’t do what every other modern multiplayer game does, they can have a great idea, even just a common-sense one, sitting right in front of their faces and they just ignore it. Hence the apprehension Geno will not be a character despite all obvious benefits he brings.