The official website of Shingeki no Kyojin listed that the third season of the TV anime series will premiere July 2018.
Along with the announcement, a new visual was released. A compilation film for the second season has also been announced and will premiere January 13.
【新規解禁情報②】
「TVアニメ『進撃の巨人』Season3」2018年7月放送開始決定！https://t.co/0mH4NgvXsw#shingeki pic.twitter.com/OaTt6MdIAp— アニメ「進撃の巨人」公式アカウント (@anime_shingeki) October 29, 2017
Visual for the compilation film
【新規解禁情報①】
「劇場版『進撃の巨人』Season2～覚醒の咆哮～」が2018年1月13日に公開決定！！https://t.co/bASUGhphFc#shingeki pic.twitter.com/7QqxkYN1wv— アニメ「進撃の巨人」公式アカウント (@anime_shingeki) October 29, 2017
