Gen Z moviegoing habits, the magic of discovering trailers and the lure of nostalgia for simpler times were among the subjects raised in a lively roundtable of top film and streaming marketing leaders held Wednesday as part of Variety ’s annual Entertainment Marketing Summit. The five executives also chopped it up about the “evolutionary process” that explains why video games have emerged as such vital source material for movies. And they debated Tom Rothman’s call issued last week at CinemaCon