Nope no themes. I tried that once, and it didn't work. You come up with something, and we'll see where it takes us.
I decided to edit and clarify. It worked for me and my opponent, but the BEC didn't get it. I think the only theme I'm going after is "Not give a crap about pleasing the BEC!"
Okay, got that off my chest and feel better. Back to the battle now folks!