I admit, I laughed at the A-Atron joke. Hard.
But this is just a fantastic origin of Transformers. I love this more than Megatron being in a gladiator pit. Rather than violence being force on him, it is him embracing violence because of his anger. And the societal structure that the trailers only hint at, is so much more horrific than I expected. Ripping out a protoform's transformation cog before they come online in order to have a labor force? I mean, Sentinel was out of touch in IDW, but dear god, one doesn't blame Megatron in this movie.
I did love seeing Primus transformed in the prologue. I do wonder what their plan is for other movies. Because the Quintessions are still an issue. And I would love to see the list of Primes they had for their 13. Because Zeta looked way too much like Galvatron toy.