Shadow complex wouldn't associate with Dark matter. Unless he saw Jack take the shot and approached him. Dark matter may be very tempted to help though. If he helped Jack capture the titans then he would get half the profit. That's 22.5 million for every Titan he helped capture.

@Psych- jack is running to them while cloaked. They may be able to see the dust from where he is running but I'm not sure about seeing him.