
According to Westworld star Evan Rachel Wood, the show's second season will premier earlier than expected, in Spring 2018.
Spring 2018 https://t.co/qM5VqCwoPA
— #EvanRachelWould (@evanrachelwood) November 6, 2017
This news means the recent halt in filming due to medical emergency will not affect the production's final timeline. Season 2 is likely to introduce other worlds in addition to Westworld, including Sumarai World. Young William (Jimmi Simpson) and Logan (Ben Barnes) will also be returning, though details of their storylines are unknown.
Source 1, 2