Athena had long said that the goal of City of Fury wasn't to annihilate Rocky, but had another purpose, and now Rocky finally knew the opponent's plan—he intended to blockade Thunderhawk City and trap him alive!
This could not help but worry him, firstly because the two Sky Cities under his command needed external supplies to sustain their livelihood, and secondly, once the contact between the two Sky Cities and the outside world was blocked, the industries of the two Sky Cities would also suffer a devastating blow!
The main industries in Thunderhawk City were exports; both the textile and leather manufacturing sectors relied on selling their products for profit, not to mention the arsenal that had just started and needed to buy large quantities of raw materials from the outside world to produce.