Kylo Ren was presented first in a 2015 film.
" Comparing the character to the one-note Vader of the 1977 film, Melissa Leon calls Ren "a living battleground between darkness and light, making him a far more resonant and familiar portrayal of that struggle than we've ever seen in Star Wars 
 Kylo Ren is also mentioned in the 2017 novel Star Wars: Phasma, which takes place before The Force Awakens

