The clash will reach it's conclusion on December 6. The official Twitter account for the Franchise revealed a new visual showing the Scout Regimen VS the titans bringing the fight to the next level.
The final season is set to premier on Crunchyroll on December 6 at 12:45PM PST and it was described as such:
"It’s been four years since the Scout Regiment reached the shoreline, and the world looks different now. Things are heating up as the fate of the Scout Regiment—and the people of Paradis—are determined at last. However, Eren is missing. Will he reappear before age-old tensions between Marleyans and Eldians result in the war of all wars?"