Could Megatron has a plan for the Forge? If Orion is the only one who can use it, it ceases to matter who actually picks it up. He's tempted to suggest that, all except the potential circumstance in which there is key information that he's missing.

Then mention of the troll suddenly catches his attention. Magdal's friend. It gives him pause.

"If the Forge is of use to no one, then we all have the options to simply leave. Do not play into the Empire's game, Commander Starscream. We all know that the Alternians are not doing this out of benevolance."