Malcolm nods, thinking that over. "I'd rather be there when he meets you anyway."

That way, Martin can't control the narrative. Not that Harley is a fool who will believe whatever comes out of Martin's mouth, but Malcolm can still shut it down quickly if he's in the room. If they don't plan something, Martin will have enough time to figure out whatever he's concocting and then will spring it on them. Malcolm would rather be the one in control.