Last night at the MCM Expo Q&A event in London, several clips were shown including the trailer, Ender’s Army, and an exclusive clip that included snippets of the propaganda video shown at Comic Con in the Ender’s Game Experience “Welcome to Battle School”. The difference is, this clip is integrated into the movie itself, and we get to see Ender watch video of Mazer’s crucial battle at what is presumably Battle School orientation.
Thanks to @AP2HHC for the video!