I'll just leave this here.
Tha...that's not how copy write formatting works at all? Original means we are referring to the first copy write not this is a new copy write, though I can see how you could get those mixed up if you don't know the legal notation? "c original x" means that's the copy write owner for the establishing (a.k.a "original") x in the series, and that it's
different from the exact copy write owners of this product(in this case probably because HAL isn't involved). In this case the original product is Smash 64. That's why Smash 4 has the exact same "original game" credit (seriously check their site) because the original game hasn't changed it's still Smash 64. Also why, for example, Akira Toriyama has a "C Original concept" credit in every single Dragonball product whether he's involved or not, because he owns the original concept copy write but not the copy write for that particular product (yes I used Dragonball as an example because people here are talking about Super so it's on the tip of my head).
The copy write for this particular product, Smash(working title), is the "C [owner] [date]), and just like with Smash 4 it is just "Nintendo" (Bandai Namco helped with development but do not own part of the copy write for any of the Smash games the way Hal used to different legal agreement). Also before anyone asks yes Nintendo does update the copy write for ports so the fact that it's 2018 doesn't mean anything.
Also like Hal has made multiple games during this game's dev time and they aren't that big of a studio so especially if this is in fact a full game it wouldn't make sense for them to be straight up be developing this in house (which I assume is the conditions for them getting a share of the copy write though I don't know the specifics for sure).
Like I'm of the opinion that this is a new game but people are just completely misinterpreting entirely irrelevant things to get a false sense of closure about something we have no confirmation on. Which is basically like 50% of any pregame hype cycle I suppose.
tl;dr - The copy write info on the site tells us absolutely nothing.
Sword Kirby is my favourite fire Emblem character. Can't wait for him to be added to Heroes
*Galaxy Brain* Horse Kirby