The shuttle at the back of Optimus is a NASA Shuttle. Now this Shuttle likely based upon reversed engineered Cybertronian technology. On Megatron and the Ark. There were rumors before of a new Space Race between the US and Russia I'm not sure if this is the product. It is likely built or re-purposed for Autobot exile. Which mean bigger than the regular Shuttle whose fleet which was retired. I have a feeling the Autobots will pull a rescue of Chicago like the rescue of Autobot City with the shuttle swooping in dropping Bots and turn the tide.