In a very weird and bold move, Marvel announced that the will be airing the next Avengers: Age of Ultron film during a college football game. To be more specific, the commercial will air during the college football championship national game on January 12th on ESPN, at 8:30PM/ET. Here's the announcement of said trailer.
The Oregon Ducks with be going up against the Ohio State Buckeyes in the championship game in a PAC 12 versus the Big 10 showdown. It's the final college game of the year, so there will already be a lot of people watching. Since ESPN is owned by Disney, this would be the best time for them to post on that channel during the year.
So make sure to tune into the BCS Championship on January 12th at 8:30PM/ET on ESPN or come back here that night to watch the trailer on Comic Vine.