Five seasons of Netflix-Marvel goodness (or, in the case of Iron Fist, mediocrity) have all built up to this. Building on last month's teaser, Netflix has released the first full-blown trailer for The Defenders. Like The Avengers movies, the project is a culmination of many interlocking 'cinematic universe' ideas. Daredevil, Jessica Jones, Luke Cage and Iron Fist -- all four TV shows stand on their own, but share characters, lore and the occasional cameo appearance that bind them together. The Defenders, a team-up of New York's street-level heroes, will prove whether Netflix can deliver such an ambitious, expensive crossover project in the streaming world.