It features the huge-ass face of one of the biggest titans in the show, the colossal titan, which is allegedly going to be bigger than the 350-foot Godzilla. Standing in front of it is tiny-ass human and always-angry protagonist Eren Jaeger:
This is the poster's inspiration from the manga:
Created by Hajime Isayama in 2009, the hit manga-turned-anime—whose manga has sold over 42 million units so far—turned heads with a story about the world's final human enclave in a land populated by emotionless AND NAKED man-eating giants.
The live-action version comes out in Japan in Summer 2015, and will be scripted by the same guy that directed 2013's Dragon Ball Z: Battle Of Gods, Yusuke Watanabe.
The cast photos were also released a few weeks ago:
Haruma Miura as Eren
Kiko Mizuhara as Mikasa
Nanami Sakuraba as Sasha
Kanata Hongo as Armin
Satomi Ishihara as Hans/Hanji