Bruce's reaction? Oh, yes, please. He'd be all, "Hmm. Interesting." And then he'd get Dick to bring in Legolas for observation and study, and very soon, he'd have a huge file on Legolas and elves in general. And Legolas would be waiting patiently, looking over Bruce's bent head at Dick and maybe winking at the human drama of it all. Then Dick would have to introduce Tim, and Tim would get into it and keep staring at Legolas and trying to figure him out, until Dick gets fed up and drags Legolas away for some hot sex.