That is what the below report in the Hankyoreh is speculating could happen if North Korea launches a rocket in October:
The main variable in future diplomatic trends is the question of whether North Korea will launch a long-range rocket. There has been discussion of the possibility of North Korea testing a long-range rocket on the pretext of putting a satellite into orbit on Oct. 10, the 70th anniversary of the foundation of the Korean Workers’ Party.
Indeed, a video was posted on Uriminzokkiri, a website that North Korea uses to send propaganda to South Korea, in which the anchor said, “South Korea’s opposition parties, press, and experts urged the government not to cast a chill on inter-Korean relations, which are starting to thaw at last, simply because North Korea launches a satellite.”Experts suspect that North Korea’s suggestive comments are intended to provide justification for the upcoming rocket launch. (………………)
This could also lead to renewed calls from the US and Japan to deploy THAAD (Terminal High Altitude Area Defense) on the Korean Peninsula to defend against North Korean rockets. If South Korea is dragged into a discussion of THAAD, opposition from China could strain relations between the two countries. [Hankyoreh]
You can read more at the link.