You're a Cybertronian in the audience of Rodimus's speech proclaiming his plan. Autobot, Decepticon, Nail; doesn't matter. Do you decide to go with Rodimus or stay on Cybertron with Bee? Personally I'd probably stay. I love Rodimus and would be tempted just to be a part of his crew. But a wild goose chase for a group of people who might not exist any more doesn't sound like a valid plan for the future. I think I would rather attempt to rebuild. Even if the Knights existed or still exist Cybertron isn't dependent on them to revive their civilization.