A badly needed reboot that will reinvigorate the franchise into a brilliant future for fans of those irresistible robots in disguise, regardless of their age.

As origin stories go, director Josh Cooley's breezy, action-packed genesis tale reintroduces Optimus Prime, Megatron and the rest of the Transformers gang, without any pesky humans hanging around the edges of the frame to muck things up.

Transformers One is set to usher Optimus Prime and his allies into a brand-new era, and there are plenty of characters fans are hoping to see.

As Transformers One looms over the horizon, the final trailer emphasizes the positive word-of-mouth that early reactions have displayed.