As this toy has hit Australia first for BigW's mid-year toy sale (as their store exclusive), here are some images/video for the benefit of others.

My photos...

The box.


Next to a Movie Voyager box, to show size.


Back


Sides


Top


The insert tray


The instructions


Out of packaging




Robot mode, compared to the other Cyberverse Optimus toys (except Trailer version, which is identical to the regular Warrior toy)...
(from left - Ultra (not bought yet), Spark Armor, Ultimate, Warrior, 2nd 1-step, 1st 1-step, Scout)


Truck mode, compared to the other Cyberverse Optimus toys...
(top left is Spark Armor, bottom left is Ultra, big one in the middle is Ultimate, two smaller ones to the right are 1-steps, and the two on the far right are Warrior and Scout)


More truck mode shots




Truck mode Spark Armor carrying Ark.




Ark armor split up into its parts


Combined with Optimus




(note - the combined mode has heals that fold out from under the feet, which I didn't notice until after I had taken the photos)


Next to Ultimate Optimus, the previous biggest Cyberverse Optimus toy.


A video review from Australian, Ham-Man Reviews...