AEON TRESPASS: If I pledged $1 during the Earlybird period, and upgrade to a Game Pledge later, will I get the Last Stand of the Gegenees expansion?

Yes! As long as you pledge within the first 48 hours of the campaign, and upgrade to a qualifying Pledge Level (including either TSoH Summer or ATO Core) during the campaign or through the Pledge Manager, you will get this expansion, free of charge!