Well this is definitely a pleasant surprise! Those who tuned in to tonight's new episode of 'Agents of S.H.I.E.L.D.' were treated to a very special dispatch from Marvel: the studio will be premiering the first official trailer for 'Avengers: Age of Ultron' during next week's all-new episode, so we guess you'll just have to tune-in again. But you were already planning on doing that anyway, weren't you? Unless you're a member of Hydra or something.