So by next Monday during the opening of E3 we are about to get a new addition to the Xcom series. www.rockpapershotgun.com/2017/…
Not much is known but it's looking to be a full expansion and arguably build on from the ending, I also think it's likely we'll have some returning characters such as a certain doctor from Xcom EU/EW.
My own personal theory is that this could be one of several expansions, there is a lot of possibilities within xcom 2, ADVENT is still around, so is Xcom, it could easily evolve into a fight between three factions and more.
So keep an eye on june 12 because this looks set to be big.