Like, I have this headcanon that Loki was actually married to Sigyn after his first landing on Earth, but the feds found out they weren’t human and in this whole confusion and conspiracy Sigyn is killed by one of the feds from SHIELD. Loki manages to escape and puts Sigyn to rest, and after much self torture and exile, he’s found by Thanos—who tells him he can help with his vengeance upon Earth for the death of his wife. Loki agrees to work with Thanos, and is forced into also finding to Tesseract. He goes to Earth, finds the Tesseract, and takes his vengeance, in the meantime creating a show big enough to reach the ears of Thor and Odin, knowing he’d be tried back home on Asgard—the second place where he has unfinished business. He also knows they needed the power of Tesseract to get back home, so he technically also returned it to its rightful owner. However, he also knows an impending war is on their hands for the now angry Thanos, who watched Loki and the Tesseract slip from his grasp. It kinda fills in a lots of holes as to why he was so angry with Earth, and adds deeper meaning to when Thor said that he didn’t necessarily want to rule, but that he wanted vengeance. Yeah. That’s one of my favourite headcanons I’m actually rather proud of it lol