It's a good idea, but IMO it has never really be realized. Megatron already felt like he was power hungry and violent, just waiting for an excuse in Exodus, the main version of that story in Aligned.I really like the Optimus and Megatron relationship being built on two people from very different walks of life who come together and bond nevertheless, before being forced apart.
A story where naive and bookish librarian Orion Pax and miner-turned-idealistic revolutionary D-16/Megatron becoming close friends before having a falling out is an intriguing one but no attempt has done the idea justice, by my count.
Putting Orion and D-16 into the same workspace allows for a much simpler and straightforward "they were as close as brothers" narrative.