This trailer doesn't really show much of anything, guess I'll wait till the actual show, prequel thingy comes out.

On the subject of the voice, It is a change so hard for long time fans to get used to. I don't really think Jon Bailey does a terrible job but he goes a bit to deep, and draws too heavily on the modern movie Prime so I too found it a little jarring. I would have preferred they cast someone closer to the Dr Smoov voice actor who sounds a bit closer to Cullens youthful G1 Optimus voice.

At some point as fans I think we have to accept some new blood to take over, Cullen's getting on in years and he already sounds vastly different to the Prime of old. Either that or they have to get some new leaders to take over, and we know Hasbro's not going to allow that.