The co-founders and leaders of Alcon Entertainment detail the business backstory of the Syfy/Amazon fantasy drama “The Expanse,” a series that Alcon owns outright thanks to savvy dealmaking by the seasoned producer-financiers. Kosove and Broderick, known for movie hits including “The Blind Side,” “The Book of Eli” and “Dolphin Tale,” also speak frankly about the state of the film marketplace and what happens post-pandemic. It’s an insightful session with two producers in the trenches.