Now that the guy the DLC is named for is dead we need to get to the Moon! First step find teleporter. This involves shooting waves of enemies and driving a school bus to a whorehouse in the desert. That makes sense right?
I don't really understand Duke Nukem Forever's obsession with the aliens, they just aren't actually a very interesting enemy they are pretty much all mechanical. Their motivations aren't ever made clear, there is never any attempt at communication from them they literally just seem to exist so you have someone to shoot.
The key great decision they made with this DLC was to reintroduce a villain with a face, one that talks to you and taunts you, someone that they could have Duke quip with and banter back to. But at some point they decide that the aliens have to have yet another giant enemy bad guy for you to kill in order to win the game.
I guess they have Dylan in there to serve as a kind of conversational foil, pity that he is just such a painful character really.