Smash Ultimate barely got any non-DLC newcomers but that was obviously a deliberate choice to sell more DLC. But every time they pick a "retro" newcomer it's always someone from the NES and never from the SNES because for some reason they've put it in their heads that the NES is the only thing people are nostalgic for.
Ever since Melee the majority of the newcomers have been NES-era (Ice Climbers, Marth/Roy, Pit & Palutena, ROB, Little Mac, Pac-Man, Duck Hunt, Megaman, Simon Belmont and now Dragon Quest). Meanwhile what has the SNES/16-bit era got? Very little in comparison. Diddy Kong, Sonic, K. Rool. The Street Fighter guys don't count since SF debuted in 87, technically making it an NES-era game. SNES is the console that always seems to get skipped over and I'm honestly tired of it.
The NES is the most overrated Nintendo console. Looking back on it I think it had an overwhelming amount of lackluster games and only really pulled ahead because of the novelty of its accessories like ROB and the Zapper. Not that I'm saying the third party NES newcomers are from lackluster games, but we don't need any more NES stuff. We have more than what we need from that era.