He's not Aesir, not an Avenger, and certainly not Thor. Perhaps that means he's not enough to defeat Thanos. There's only one way to find out.

Thor found a different way to deal with the Aether. As Loki rots in his cell, Hela is released and steered in the World-Walker's direction after failing to retrieve Heimdall's sword. But trying to heal the broken, possibly ex-supervillian so he can accomplish her objectives is going to take far more effort that Hela originally thought.(No slash or smut.) (Brother and sister)

An AU of Mikkeneko's 'The Wagers of Sin'. Recommended you read that first. What if Odin hadn't been so lenient to Thor? Would Loki let his brother suffer alone? No slash.

Loki has nothing but time sat in his cell and so he remembers. He remembers the good and the bad, but mostly he just remembers Thor. Leading up to TDW, no slash.

AU in which Odin takes Loki for the sole purpose of raising a monster beside Thor to make Thor look better—to make a villain in order to make a hero—but Loki, being the intrinsically sweet soul that he is, and Thor, loving his little brother unconditionally, completely ruin Odin's plans. (Brotherly Fluff; Evil!Odin; Protective!Thor; no pairings; one-shot.)

The Four Horsemen are sent to a small town so that things can die down before they begin more work for the Eye. What adventures will ensue as the four try to live together in one house?

Avengers AU where Loki escapes from the Chitauri and ends up on earth. Injured and exhausted, he disguises himself as a cat. And Steve has a thing for saving abandoned kittens. Then when The Other is sent to retrieve a couple stolen relics, Thanos has an army and a plan, and everyone thinks Thor is insane... (Protective!Thor, Protective!Avengers, BAMF!Loki, no pairings)

Thor returns to Asgard with his brother in chains. Loki doesn't seem to have much to say for himself, but Thor makes up for him. Post-Avengers, angst, no pairing, fail!parenting Odin.