Yeah, I realized that. I saw the creator of the game say that the ending for 2 was planned when they were making HM1. I love it when games foreshadow events in later games, then you come back to it and realize all the details, hinting at the sequel.
Also, when Beard saves one of the soldiers, Beard says it's on the house, when the other soldiers thank him. It's probably why he says that a lot in the first one. Another nice detail.