At this point in the year, fans of network television are playing a slow-reveal guessing game. So we get the names and occupations of players in the new season of Survivor. We get some general network-montage advertisements that highlight the best that the “Big Five” have to offer. But then, bit by bit, we get full trailers with more footage with bigger hints of what to expect. Case in point: this new trailer for DC’s Legends of Tomorrow.