There's a Japanese magazine pic that's rumoured to be the first look at the upcoming Attack on Titan 3DS game. According to Japanese site Amaebi, the image is from an upcoming issue of Bessatsu Shonen Magazine.
In all fairness, this is a blurry magazine snap and often 3DS games look better in person. While this image makes the in-game graphics look rather bad, it's a good ideal to hold your judgement until there are proper images.
3DS「進撃の巨人」 ゲーム画面判明！ なんだこのグラフィック！？ [Amaebi]