Got a question I've been meaning to ask - let's assume for the moment that Terry will return, and SNK's cooperation has made Sakurai and/or Nintendo keen on the idea of working with them further. Which SNK characters do you think we'd have a chance of seeing, and who would you want to see?
Personally, I think the idea of expanding on SNK's representation is pretty overlooked. Even aside from how easy it would be to bring in another character, Fatal Fury / King of Fighters alone has some great options. Athena stands out to me as someone worth discussing, with a pretty substantial history within the company and a perfect attendance record across KOF titles. Geese Howard could be a great foil to Terry, and is an iconic fighting game villain in his own right. And Iori is both pretty damn popular and well, Sakurai thinks he's the coolest guy ever. Not to mention Kyo, the defacto protagonist of KOF. I'd say most of these would feel a whole lot different than anything Ryu / Terry / Kazuya are currently offering as well, would love to dig into more archetypes of traditional fighting game characters and how those can be implemented in Smash.
I think there's a great deal of potential within secondary SNK series too, though. Metal Slug would be an absolutely fantastic addition to the series, and on a personal level is what I want to see the most. A run and gun styled fighter would be really dynamic, particularly given Metal Slug's focus on heavy artillery compared to say, Mega Man and would have to be one of the most expressive characters on the whole roster. This one pretty much writes itself, I really hope Metal Slug sees some acknowledgement next time around because I was pretty disappointed not to get even a couple Mii Costumes of Marco and Fio.
And I got into Samurai Shodown recently, and there are some extremely cool options. Nakoruru is the more common go-to, but I'd be super down for a more traditional samurai approach with Haohmaru too. It's kind of striking how little samurai representation we have on such a big roster. There's some interesting mechanics to pull from that series too - perhaps there's a way to disarm a Samsho character, or moves that force them to drop their weapon akin to like... K. Rool's Crown Boomerang, but more of a disadvantage state. And the obvious rage implementation, which I'd wager already had some influence on Smash too.
Bottom line, for as many good choices as there are, we don't really talk about them too much. Perhaps it's just a matter of how big a question mark Terry's return is to begin with... but as far as series and companies with ample room to expand, be it supporting characters or compelling new series, I think SNK is about as fruitful an option as most of the others.