The Marvel Cinematic Universe continues to chug along with the decade-long narrative begun with 2008's "Iron Man," whose first cycle narrative it plans to end with "Avengers: Infinity War" later this year. And now the studio has announced that actor Paul Bettany will be back for more galaxy saving in the as-of-yet untitled "Avengers 4." Bettany - who first starred as the voice of J.A.R.V.I.S.