>>47295891Sylveon was announced on Valentine's Day 2013. Fairy Type was announced E3 2013 and X and Y came out the same year. Yeah, I dunno what the fick happened to the time either.
Legends is set to come out early 2022, which means Gen IX presumably is 2023 and IF, that is IF it introduces new Eevee family members, it will be the first time in 10 years.