Here’s a translation of the teaser from Anime News Network:
Narration: Over one hundred years ago… Half of humanity was eaten by the titans that suddenly appeared… The humanity that remained created a giant wall, and lived peacefully.
Text: Anticipated by the whole world!!
Text: Live-action film green-lit!
Mikasa: The world is cruel…
Eren: If we mess up, that’s the end for humanity.
Title: Attack on Titan
Text: The attack begins on August 1!
The story features seven new characters created by the film’s director Shinji Higuchi in collaboration with series creator Hajime Isayama. I’m personally looking forward to seeing if it holds up to the Attack on Titan opening sequence remade in Super Mario Bros. 3 or the live-action Attack on Titan porn.