Both ships would, as they neared Coldlands, begin to drop in temperature. The heating systems would fail, and the temperature would keep dropping. the ships, as they stayed around Coldlands, would freeze in space while a mild gravitational pull(stronger than Coldlands' normal gravitational pull, anyways) drew them towards the planet. The cold would pervade through the ships, freeing the engines, icing the thrusters, ect. Zero's pod was worse, as the closer it got to Coldlands, the more the influence would affect her. Depending on when she was recovered, she might have been frozen alive by the time they got to her.
As well, if the ships that dared agitate Coldlands didn't get out of there fast enough...The very air running through the ships would turn to a solid block of ice, sealing their fates within their metal coffins.