Thor and Transformers trailers come with the hammer and Alpha Trion

The biggest news in trailers this week: a sneak peak at "Thor." The big-budget, big-name movie itself won't be out until May 6, 2011. But the trailer gives a pretty good idea of what's coming.

The adaptation of the Marvel comic (there‘s a whole slew of Marvel heroes coming) stars Australian actor Chris Hemsworth (as Thor), Natalie Portman (as Jane Foster), Tom Hiddleston (as Loki), and Anthony Hopkins (as Odin).

Kenneth Branagh directed the film which will be available in – surprise-surprise – 3D. Check out the 2:30 second trailer below.

Also out is the teaser trailer for Michael Bay’s third Transformers movie "Dark of the Moon."’ The trailer (below) doesn't reveal much other than a Transformer connection to the space race of the 1960s and a Transformer who is speculated to being Alpha Trion, one of the original thirteen Transformers (from the old cartoon show). We’ll see the whole movie on July 1, 2011 in 2D, 3D, and IMAX.

Real Steel and Rio, too

The first trailer is out Walt Disney Pictures’ "Real Steel," starring Hugh Jackman and Evangeline Lilly (from ‘Lost’). Jackman plays a has-been boxer who now must train an eight-foot robot to be a contender. If you remember Marx toys Rock 'em Sock 'em Robots, you'll get the idea. It opens in regular and IMAX theaters on October 7, 2011.

The new trailer 20th Century Fox’s animated film "Rio" debuted too. Voice actors include Anne Hathaway, Jesse Eisenberg, Jamie Foxx, Tracy Morgan, and will.i.am. It opens in 2D and 3D on April 8.

Hobbit casting continues

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