Sometimes fans make an great posters of their favourite films. Whether its new take on studio's own poster or making their own.
Thor: The Dark world has few official studio film posters, for different markets.
This is one of the official film poster for Marvel's Thor: The Dark World.And this is the fans made one,which ended up being used by an cinema in Shanghai.
Maybe an employee of the cinema decided to use the Thor and Loki lost in embrace instead of Thor and Jane. Fandoms and their fan fiction.