AU - Doppelganger Fusion: Does this refer to the 1993 movie?
Canon AU - Bucky's Recovery Is Not Easy doesn't seem like an AU. Without explanation, I'm planning to reject it.
Canon AU - Extremis regenerates: What does this mean/how is it an AU?
Canon AU - PTSD: What does this mean/how is it an AU?
And changes made:
Canon AU - Brock Takes Sam Prisoner changed to more general Canon AU - Character Taken Prisoner
AU - Victorian merged with AU - Regency to create AU - Regency/Victorian (I know they technically refer to different eras, but I've never seen an AU that was identifiably distinct)
Canon AU - Loki raised on Jotunheim: already covered by Canon AU - Jotun Loki
Canon AU - Thor is the Villain/Loki is the Hero already covered by Canon AU - Role Reversal
Canon AU - Bucky joins Agents of SHIELD team changed to more general Canon AU - Agents of SHIELD Team Composed Differently