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.
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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.