"He just left? No goodbye, no sound? He turned his head, and he was gone? He clearly said he was joining our operation."
Watching Batman suddenly vanish into the darkness, Deadpool curiously sidled up to Cousin. After vigorously picking his nose, he flicked a bloody booger from his finger and said, "I thought he'd stay for a meal or something. We could go find some meaty tentacles in space to try—maybe they'd be edible if we cut off the heads. Also, Batman looked at me weirdly just now. Did women hurt him so badly that he likes men now? He's actually pretty handsome, but I'd advise him not to come after me. He should go hook up with Lucifer instead."
Listening to his rambling, Deathstroke patted his cousin's arm and tossed him a cigarette to cover the smell. "His goal from the very beginning was to learn the whole plan from me. Saying he wanted to join the operation was just an excuse to get you to lead the way. Helping you find Monica was his bargaining chip for this 'travel ticket.' He's a smart man. If you believe everything Batman says, sooner or later he'll play you to death. Still, letting a little information slip to him has its benefits."
He probably would not be played to death, but at the very least, he would end up like the Justice League—giving up thinking one by one and becoming nothing but tools.
Even smart people like Green Arrow had no choice but to retreat to the sidelines to preserve their intelligence. It was practically a law of causality.
"Dark. Too dark. Do you people from DC really have to calculate everything so precisely? If people live according to plans every day, where would the surprises be?" Deadpool sighed and helplessly