Dear Bat Man,
I have bested both your brother and his enemy! They have both been captured and soon will become nothing but a puddle of melted plastic if I have my way! No joke...muah hahaha.Who could be this diabolical, you ask? It is I:Gigantic-head Spock.
If I have my way, Batman and the Joker will never:
I will hold them for a week. I will give you an opportunity to come to their aid. If you do nothing, they will be vaporized.