Yep. Originally George Lucas predicted that the first teaser trailer for the film would be out "around Thanksgiving," and more recently that has changed to"before Christmas." But now it seems Lucasfilm/Paramount has decided to keep the trailer to itself until the Superbowl, giving the first Crystal Skull footage the exposure of the most watched TV event of the year for the marginal cost of $6 million
More here.
Source: Wild About Movies Blog