Welcome to Ilus. pic.twitter.com/X84gZMf2Gu— The Expanse (@ExpanseOnPrime) July 20, 2019
Short interview they did before the panel-
They talk about the cancellation, Save The Expanse fan campaign, the global response to the show now, how everyone can be represented in this show (a rarity in sci-fi), teasing season 4's gold rush and how this is a new chapter for the show- humanity leaving the solar system for the first time.
SOURCES: #1, #2, #3
Too long to wait, but the footage got me hyped for season 4, I missed the Roci posse.