Orion could not go to him.
Megatron had been lost: shattered by earth, fire, wind, and by a war that had destroyed worlds and dreams along with countless lives. What had been salvaged of the great mech had been placed under the watchful eye of human governments, whom Orion did not want to cross paths with just yet. The rest was scattered across a foreign world far from their own.
Orion did not want to see him anyways. Not like that. Not a greyed corpse, an empty shell. He did not want to crouch over his mentor’s frame and cry for forgiveness for failing to protect him like he promised he would.
So in his grief the librarian turned to another Megatron. His own.