Perhaps the Backup in the god-level realms for the Dinobots should be Metroplex ... Or maybe I could just reference him somewhere ... *shrugs* I'll find it out later.

Know what, I'll Replace Megatron and Soundwave with Optimus and Bumblebee (or some other main Autobot character), and have Metroplex be Optimus's backup. Then Optimus and said friend can be on team Alpha, balancing it out with their awesomeness.