While the second season of Attack on Titan or Shingeki no Kyojin, was announced sometime ago, it was stated that we wouldn’t see anything from upcoming anime until sometime in 2016 (link). However it seems that this wasn’t 100% after all. Footage of second season was captured, thanks to a poster on 4Chan, that starts right after the end of the first season, where it was observed that there was a titan in the wall.
And while the leak is only 2 minutes long, it definitely leads up to what could be a great second season for Attack on Titan. If you’re a fan of the show, i’d check it out before it gets hit with a cease and desist gag.
But other than this sneak peak, no much is know on how close the anime is going to follow the manga or if we’ll actually have to wait until 2017.