I know that people are discussing Nintendo characters for DLC, but I'm just going to say to tread carefully with that. I honestly know nothing in terms of what DLC is going to look like, and it's not like I've been told anything by anybody (even if I was, I wouldn't share what I knew), but I don't feel confident in any Nintendo characters being DLC.
At this point, I feel that the Square character is probably still a thing. It's not so much because Erdrick has been leaked, but it's just a feeling. I'm feeling like Lloyd Irving will be added...it just makes sense, especially considering out of all Tales characters, he was the one who got a Mii costume.
In terms of personal wants, despite me not being a huge fan of his games (I played the remasters on PS4 and found them more infuriating than fun) I feel like Crash Bandicoot getting in as DLC would be a major nail in the coffin for any attempt to continue the Playstation All-Stars series (I mean, having Snake, Cloud, Joker, and Crash in the game is a major O O F in that regard).
I really don't know otherwise though. A lot of folks are focusing on characters that bear no popularity in more than one region of the world, which is where characters like Doomguy and Dragonborn fall flat. A character from Dark Souls would be hilarious to me, but I can see it happening. I can see it now, "Solaire is the Dark Souls of Smash characters"- IGN Reviewer.
Basically, it's anyone's guess. It's a nice feeling to know most leaks are probably trash now. I still wouldn't get any hopes up for Nintendo characters though.