Sorry console fans, it looks like you're not going to be fighting against the Advent forces. XCOM 2 was announced today exclusively for PC, picking up 20 years after the conclusion of Enemy Within.
We lost. The aliens have created an oppressive society under the guise of a better life for all humans (the source of the recent Advent Future teaser site). XCOM is now on the offensive, working from the shadows.
The title is under development at Firaxis, who is retooling the soldier classes and customization, while adding new enemies (such as the cobra-headed soldier we see in the trailer above).
XCOM 2 will be out this November on PC.