Watch a featurette below for Transformers: The Last Knight featuring Michael Bay and Anthony Hopkins, which may reveal a new Autobot tank, Guzzle.
Michael Bay saved Freya The Dog and put her in the movie working with Hopkins. Looking closely at the video, it appears as if some sort of tank is following the pair around, perhaps protecting them.
The Autobot tank looks to be a type of WWI or WWII British tank.
Perhaps it's Guzzle?
Guzzle was a toy a part of the Transformers: Dark of the Moon line, but not in the actual movie, I believe.
Other possibilities could be Warparth or Hardhead.
"Transformers: The Last Knight" has a June 23, 2017 release directed by Michael Bay starring Mark Wahlberg, Josh Duhamel, Stephen Merchant, Isabela Moner, Jean Dujardin, Jerrod Carmichael, Allen Phoenix, Lauren Haddock, Stanley Tucci, John Goodman, Ken Watanabe, Tyrese Gibson, Anthony Hopkins, with Peter Cullen returning as the voice of Optimus Prime.