Pony Canyon, the distributor for the Attack on Titan anime series, announced that there is a fourth season coming in 2020, but that it will be the last for the animated series.
A brief, 15 second video posted to YouTube reveals this, and that it will be broadcast on NHK.
Funimation currently streams both subtitled and dubbed versions of Attack on Titan for North American viewers through their FunimationNow service.
Source: Funimation
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