MTV the confirmation he will be back for Thor 2.
An Avengers cameo is still unknown as Idris wouldn't reveal anything. Elba gave a shout-out to Luther co-star Ruth Wilson during his acceptance speech. I had been hoping that Marvel would consider hiring Ruth for future films because of her amazing performance in the BBC series. Currently she's about to start production on Disney's Lone Ranger so it would exclude her from nabbing a role in either Iron Man 3 or Thor 2.