I made a video of the trailer with pictures and subtitles in an attempt to recreate the trailer here it is:

http://www.dailymotion.com/video/x22vikl_leaked-san-diego-comic-con-2014-sdcc-avengers-age-of-ultron-trailer-audio-with-pictures_shortfilms

This is the audio only version of the trailer that was released at Hall H in Comic Con 2014