Legends of Tomorrow is not just a glittering joy bomb, but a TV anomaly for a couple of reasons. For one, it gets better with every new season, learning from its past mistakes and embracing a meta appreciation of its growth. Two, it’s a rare series that doesn’t associate being an "adult" show with darkness; it’s a superhero show that incorperates elements of horror and exceptional emotional stakes, and yet, is never bleak. It actually allows its cast to be adults — sexual beings even! — and fully embraces the idea that drama coming from joy and humor is …