A variety of purchasing options for Transformers: The Last Knight have appeared on Amazon, Target, and other sites! First up is the Target-exclusive release of TF5 with a disc of bonus material. Also up for grabs is a Transformers: 5-Movie Collection containing all five Michael Bay films: Transformers, Transformers: Revenge of the Fallen, Transformers: Dark of the Moon, Transformers: Age of Extinction, and Transformers: The Last Knight. Keep reading for more details!
The 5-Movie Collection is listed on Amazon, but a Russian site known as transformermovie_vk has also posted an image of the Steelbook edition to Instagram! This set is a six-disc set, so expect some kind of bonus features though nothing seems to be known about them at present.
Going back to the Target edition of The Last Knight, the 50 minutes of bonus material are not currently known - but it's extremely unusual for deleted scenes to be retailer exclusive, so don't expect to see Cogman rip Nitro Zeus' head off and steal his body or anything.
Transformers: The Last Knight hits physical media on September 26th. It'll be available for on-demand streaming services a bit earlier, on 9/17.