Now that I've finished it, from what I can tell the plot is essentiallyI finished it man
It just felt like I was missing something
Kate is from another dimension and was chosen to take over the world. She starts off by "conquering" Goro's gang. Years pass and Zvezda becomes known and a threat to the Japanese government; specifically the governor of Tokyo. As such the governor contracts White Light to take care of them. Then that whole prophecy scene happens only to never be brought up again. The governor then takes matters into his own hands and ultimately fails causing Tokyo to be conquered by Kate. The series ends with them setting their sites on the USA. It is implied that Kate does infact conquer the world judging by how episode 1 opened.