What vehicle has never been a TF that you'd like to see?

[KalEl]

One of my favourite moments from The Dark Knight Rises:
Alfred Pennyworth: "Will you be wanting the Batpod, sir?"
Bruce Wayne: "In the middle of the day, Alfred? Not very subtle."
Alfred Pennyworth: "The Lamborghini, then. Much more subtle."

wasn't that from the second film? The dark night.
I also love the quote though Alfred is gold.

I'd love to see A truck! Oh wait....

Im not sure to be honest, the transformers extended universe is so large now that it's a hard one.