Definitely fits within the context of this game. Here's what I think.
That guy from the pod is the new Helghast leader. He's not Stahl though, he's most definitely the guy narrating the trailer which sounds nothing like any prior characters. Devastated by the loss of his home world, he devises a plan to take over Vekta and make it the new Helghan. To do this, he manipulates the events that follow so that Vekta takes in and shelters Helghasts refugees. While segregated from the rest of Vekta, he secretly plans a massive attack to take to swiftly take over without warning. After thirty years of preparation, the bombing of the VSA tower in the demo marked the beginning of their re-invasion.
I like the way you think