The Autobots have become wild animals.

The Autobots became wild animals: Optimus Prime became a lion to match his color.
Bumblebee became a tiger to match his color.
Arcy became a leopard with spots, also to match his color.
Ratchet became a deer to match his color.
Bulkhead became a rhinoceros, also to match his color. You (guy/girl, describe yourself) were accidentally left behind when you were on an excursion through the savannah, and now you are in the savannah (the rest is up to you, bunnies :3).