User blog comment:Sim0n2170/Attack on Titan Season 2 announced for SPRING 2017/@comment-5774380-20160703133127/@comment-8458738-20160703172203

Wit Studio also worked on other anime Rolling Girls, Seraph of the End, and yes Kabaneri of the Iron Fortress.

This type of thing when it comes to studios and trying to hold off a anime season and just milking the cow that is Attack on Titan. Studio Pierrot does it with Naruto with the endless filler.