Trailer out for XCOM 2, basically the skinny is it's an alternate history of the first game where the official XCOM group got completely steamrolled by the alien invasion and they've continued the fight since then as guerrillas against the new world order.

And they've added procedurally generated missions and AI, which is cool. Opens up the potential for ambushes and stealth instead of enemies auto-detecting you via LOS and taking cover automatically like the first game.

I wished that they continued the story where the Uber ethreal warned of a larger threat and the continuation of the EXALT war.