Thor remembers being on The Grandmaster's ship along with Banner and Valkyrie, just escaping Topaz's ship and Sakaar. They were headed straight to Asgard for Ragnarok is in the process of happening. His newly discovered sister more interested in bloodshed than peace, and needed to be stopped; parting ways with his brother Loki Thor continued his mission. This would not slow him down, he would fight on behalf of Loki for he too was a citizen of Asgard.
As soon as they left Sakaar's atmosphere Thor felt strange, his head hurt, he felt sudden agitation, he stood, but wavered and fell to the floor of the ship, he could hear Bruce call out to him, he felt the hand on his shoulder, but as soon as he had closed his eyes everything went black.
He awoke, his eyes blinking slowly. He opened them to meet with a blue light, he shot up immediately, panicked. This was not Asgard or the ship he was previously on.
A voice spoke in his head, obviously alarmed Thor's eyes went wide.
"Who are you!?" he yelled confused, minutes past and there was no response. The voice spoke again, encouraging him to stand. Pensive, Thor let his feet hit the ground, he looked around trying to spot anyone who might cause him harm or even be able to help. Finally standing, he felt a dull pain throughout his body, the feeling fading almost as fast as he felt it.
The voice came again, instructing him to touch the strange blue energy wall stood before him. Reasonably, he was distrusting. He slowly walked to it, gently reaching out to it before it shattered around him. It revealed a much larger room, it was peaceful, beautiful; but that was the last thing on Thor's mind. He spotted the chest and walked towards it as the voice encouraged him again to open it.
@Yun Lee