I bet you're excited, right?
Well here it is, the first theme:
The 7 Deadly Sins.

You can pick any one you want, but make sure that it's known as to which one it is.
You have up til next tuesday(11/16).

7 Deadly Sins:
wrath- anger, vengeance or punishment.
greed- excessive or rapacious desire esp. for wealth or possessions
sloth-laziness.
pride-a high or inordinate opinion of one's own dignity, superiority
lust-intense sexual desire or appetite. 
envy-a feeling of discontent or covetousness with regard to another's advantages
Gluttony-excessive eating and drinking. 

You can add any twist you want to them, just make sure it's not too drastic. (: