During E3, NaviFairy had the chance to interview Jordon Thomas, and among the topics brought up was Dr. Weir, who will join your team in XCOM. Among the intriguing things about Dr. Weir is that 2K Marin is not at all concerned about talking about his sexuality. In many ways, his sexuality and politics inform who he is, particularly considering the time period in which the game takes place. Makes sense, while sexuality does not necessarily inform how our personality and interests take shape, at times the reaction to such can (though it does not need to do so).
This, then, is the video that was the demo that was shown at E3, as well as showing the mission to recruit Dr. Weir.
As Jordon Thomas notes in the bit explaining the video:
2K Marin had just finished working on BioShock 2, and that game will always be deep in our DNA -- but our first crack at adapting XCOM to a more personal, real-time experience was way too much within our creative 'comfort zone'. It was kind of a run-and-gun affair, without a lot of focus on the command of your squad, or indeed on tactical play itself.
Candidly, it just wasn't "XCOM" enough for the hardcore fans of the original games at 2K Marin, who serve as our creative conscience. So over the past year, we've made some pretty aggressive design changes, in pursuit of the feelings that we experienced when we played the original games. I'll cover those in the video itself, but a quick note about story:
What I find interesting is that while the video does show a fair amount--at least, that's what I'd call 22 minutes--of gameplay, it also gives us that information about Weir. The politics of the time are something that seem to be informing quite a few narrative choices, and as NaviFairy's interview with Thomas highlighted, this is as much about an alien invasion as also setting the mirror on US society from that time period.