Transformers Age of Extinction | video

You don't get much idea of the storyline from the teaser footage -- despite it being a long-ish 2.5 minutes -- but there's enough of a taste to let you know what's in store when the film is released in June.

The action kicks off with Optimus Prime in a very sorry semi-truck state being hauled to a barn, where a probe into the vehicle's materials, and some jolts of power, reawaken the transformer mode. At that stage, he looks in severe need of a wash and wax as well.

However, a bit of barn-busting action when the men in sunglasses turn up to take him proves he's been restored to ...erm, prime condition.

Other cars appear in the trailer, including the black and orange Chevrolet Camaro SS (Bumblebee) transforming in a museum and later out and about but in four-wheeled form. And there are also some fuzzy cameos from a green Corvette Stingray we think will be the autobot Crosshairs, what looks to be an Audi R8, and another SS -- concept matt black with orange trim that seems to be a later incarnation of Bumblebee. 

This fourth in the Transformers franchise stars Mark Wahlberg as struggling inventor -- and autobot reviver -- Cade Yeager, and the continuing voice of Peter Cullen, the original and still only tones for Optimus Prime from the 1980s TV series through all four movies.

This reporter is on Twitter: @KarlaPincott

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