Might be neat if there was like some colony where it was all Headmaster beasts. Like the Transformers crashed and were locked in altmode, and were "driven" by robotic warriors who fought over a Cybertronian artifact that blew up and bonded them together into a mentally synced robot.
(The Transtector version could also work with robotic non-converting beasts native to the planet, being ridden by a crashed Cybertronian crew.)
(The Transtector version could also work with robotic non-converting beasts native to the planet, being ridden by a crashed Cybertronian crew.)