Aliens: Colonial Marines has raised blips on a few retail radars, including GameStop, Green Man Gaming and Amazon. It looks like "season passes" for first-person shooter DLC are becoming about as inevitable as an android's betrayal.
Usually $30, though discounted to $27 on GMG and GameStop, the season pass promises access to four packs of downloadable content at a discount of 33 percent. The packs will run from this March until summer, and they promise "campaign content, additional multiplayer maps, new modes, character customization and more."
So far, the season pass is only showing up for the PC version of Colonial Marines, though it's reasonable to assume it will be available for the Xbox 360 and PlayStation 3 versions as well.