According to ephotozine, Samyang will announce a total of 8 new lenses at upcoming CP+ Show 2019 in Japan, and release date in Spring of 2019. Currently no info about what lenses are coming, maybe include some new Sony E-mount, FE mount lenses ? Stay tuned.
Samyang/Rokinon E-mount/FE lenses can buy from Adorama/B&H Photo Video.