Tomorrow's much-anticipated Superbowl movie trailers are beginning to arrive online, with G.I. Joe: Rise of Cobra and Race to Witch Mountain landing earlier today (and yesterday), and now we have new previews for Year One, Land of the Lost and Pixar's Up. First we have Year One, which I don't believe is a Superbowl spot because it's over two minutes long -- but it's definitely our first look at the flick, which stars Jack Black and Michael Cera as a couple of moronic hunter/gatherer's living during biblical times. Watch as both Black and Cera stumble across two legendary feuding brothers, played by David Cross and Paul Rudd. Produced by Judd Apatow, and directed by Harold Ramis, Year One hits theaters on June 19.

And the actual 60-second spot is here

Next we have Land of the Lost, starring Will Ferrell, Danny McBride and Anna Friel. Based on the classic TV show, Ferrell plays a scientist who's sucked back through time and into some alternate universe where all sorts of funky creatures reside. Personally, I think this one looks real fun -- c'mon, Ferrell and McBride together on screen can only produce awesomeness times twelve. It's in the rule book! Land of the Lost hits theaters on June 5.

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Finally we have Pixar's next, Up. Cinematical will be checking out a whole 45 minutes of this flick later in the week, but for now here's the film's Superbowl spot. Up tells the story of a 78-year-old balloon salesman who fulfills his lifelong dream to tie a bunch of balloons to his house and travel the globe. Check out the trailer below. Up hits theaters on May 29.

UPDATED: Here's the Fast and Furious Superbowl TV spot, which marks the fourth installment in the hip-hopped street car racing franchise. Both Vin Diesel and Paul Walker have reprised their original roles ... but all we really care about are the cars. Fast and Furious hits theaters on April 3.

Also, those folks who have the 3D glasses can check out the Sobe commercial below, featuring some of the characters from Monsters vs. Aliens. The actual 3D Superbowl trailer for Monsters vs. Aliens will debut at the end of the second quarter.

Here's the spot for Angels & Demons ...

Here's the 3D Monsters vs. Aliens trailer ...