Since the beginning of the week, ADVENT’s website got progressively „hacked”. So far, the two main guesses about 2K’s project was that it’s either going to be a new Bioshock game, or a new XCOM game, but the site received a pretty solid giveaway cue about what it’s going to be. Although the new advent_lies.html page seems to be an innoncent ADVENT logo, but it has a few letters in a different color, and the exact same color was used in the technology’s presentation’s PDF file.
Reading these together can be put together as VIGILO CONFIDO, which is one of the known sentences from XCOM, pretty much being the motto of the franchise. So our guess is that’s it will be XCOM 2, but 2K will announce it in a few days at worst.