Grimlock ♥ Ultra Magnus

They tell us who Thirteen is.   I'd been thinking this would be revealed as it explains all the super-specialness of Orion Pax/Optimus Prime.   

He is, in fact, an original Prime.   Kinda.   (This also could explain a scene in Revenge of the Fallen where OP is called their descendant.  In a way he is, just Thirteen, made smaller, less like the original Thirteen, to live amongst the Cybertonians.   He isn't Thirteen, in a lot of ways, even if the signature of his Spark is the same.   I can see them calling him a descendant, especially if they want to respect his wishes and not name him as one of the original Primes.)

Also, awesome.   They go into the Predacons, and Predaking. 

Also-also, I need something different right now.   This is heavy and an emotional roller coaster for me -_-