Diana's elation faded as swiftly as it had come. She'd been around Bruce for many years, and knew enough of his body language to see he wasn't interested in discerning why she was here. No, his focus, his attention was completely and utterly elsewhere.
Disappointed, Diana placed a hand on his shoulder. From where she stood over him, she could now see the faintly colored vial he held. He was researching something. Reasearching a mystery that apparently was of much greater importance than the reappearance of an ageless ally.
"Can I help you in this?" was all she said, resigned to knowing he would do what he had to, and she could only stand aside.