If there were exactly six new universes introduced in Super Smash Bros 2018, what do you think they would be? You must pick one retro and two third parties (not because that's going to happen, but because I said so.)
And obviously Splatoon has to be one of the six.
IMO:
- Splatoon
- Excitebike
- Rhythm Heaven
- The Mysterious Murasame Castle (Retro Rep)
- Bomberman
- Castlevania
The reason I don't count Excitebike as the official stand alone retro rep is because his game has received several sequels, kind of like Punch-Out!!.
The criteria for this little game is that you must pick a retro character with only one installment (I know Kid Icarus had two before Brawl, but whatever. I'm making the rules here.)