Attack on Titan Season 2 Ended with 12 Episodes. Attack on TItan Season 2 started with the beast titan and ends with eren unknowingly using the founding titan’s power. This season featured the battle between Survey Corps and the armoured and colossal titan.
Attack on Titan Season 3 will start with Pastor Nick’s murder and end with the demise of Rod Reiss. The upcoming season (Season 3) will feature the uprising arc of the manga. The Survey Corps will revolt against the monarchy, which considers assets more important than mankind.