Sending down landing teams aids in your search for the Super Weapons to prevent the Cosmic Hegemony from their nefarious plans. Beware though of 3 new Vassal aliens who have joined the Hegemony to rule the galaxy.
The Pulp Invasion X2 expansion adds new exploration cards, new captains, a new crew die, and a helpful landing team.
For this expansion there are 2 new Captain cards that use the new Landing Crew die, 3 new Alien Vassals that affect game play while in the various Hegemony sectors. 2 new Planets to explore and 2 additional Super Weapons with new actions.
Additionally there are 8 new exploration cards, which change game replay-ability since you only deal a subset during the game. Most have beneficial actions and allow for greater player strategy.