Chris Hemsworth and Brian Tyree Henry stepped onto the CinemaCon stage to introduce "Transformers: One," featuring a young Optimus Prime and Megatron. In an extended 3D sequence, the clip shows ...

Autobots, assemble: Paramount has released a trailer for "Transformers One," the animated prequel film ... Hemsworth will voice young Optimus Prime alongside Henry as young Megatron.

If Amazon sells out, it's worth noting that the Lego Store restocked Optimus Prime, too, but you'll have to pay the full $180 MSRP. Lego officially denotes Optimus Prime as "hard to find." ...