Board Thread:Questions and Answers/@comment-130.105.193.137-20160508052416/@comment-25942629-20170225153142

That is only speculation. Just because fans are ready for it and make website pages in anticipation doesn't mean it will happen. There is no guarantee of a new season unless WIT Studios makes an official announcement. Even then, WIT Studios took quite a long time to release any additional Attack on Titan seasons. :(

If they wanted to make a new season soon, there's plenty of LN material.