Mostly right now I don't feel like I have anything for Terra to do. Right now, given that's what everyone else is doing, Terra would be most likely to sit and wait for the Beyonder with America. I was going to have her try and smash up the ship, but that would now ruin the plan of turning the robots against the Beyonder. Regardless it seems like we're still just waiting for the "real" battle to start.

If you do happen to move the battle, I have an idea I think you'd like.