I don't know, I think that footage from Sanctuary showing Superman opening up about his origins and the psychology of why he does what he does and then commenting on how bad it would be if this footage with all their secrets got out, right after learning that some footage was released is pretty emotional, and a terrifying cliff-hanger for those that care about villains getting info about the heroes and their families.
Also, remember, before she became Harley Quinn she was Dr. Harleen Quinzell, a criminal psychologist, which is how she met "Mistah J" to begin with. It's not hard to believe she could use psychology against the Trinity, hence luring them there in the first place.
So yeah, I enjoyed it, and am intrigued with where the story is going, and just what Barry found that convinced him Booster was responsible.