User blog comment:ProfessorKilroy/Full Superbowl Avengers TV Spot/@comment-4644597-20120207185739

Marvel is really attempting something new with the Avengers movie that movies just haven't done. Time to time there have been movie crossovers to varying degrees of success. But the shared universe they are trying for. It's a first, and in movie speak this Avengers movie is the ultimate "crossover."