That the Autobots and Decepticons of the Prime universe react to the world of Bayverse, I want to see their reactions when seeing how sadistic, brutal and violent they are as much as the Autobots and Decepticons, especially Optimus... when seeing this psychopath version of him, who killed to Megatron more than 3 times, who is unforgiving and resorts to violence by killing his enemies.
I have never seen Transformers Earthspark before. But they're react to each other is really great idea. And it's too late to say "Happy Birthday, Airadi!"