Lucifer swallows a snorted chuckle. "If I meet him shall we share notes about creative ways to tell Michael to shove it?"

The humor is there but Lucifer can appreciate any human ballsy enough to tell an angel to shove off. He's at a loss for the moment though, still too little information to put anything together fully. Castiel's fondness for these people explains why Balthazar feels involved.

"What complications?" Lucifer wants to be prepared for anything he can be before meeting these people or Balthazar asking for his assistance.