Of course! It's a clever little hint about the fact that Benedict Cumberbatch (the guy playing Sherlock), will appear as a villain in the upcoming Star Trek movie; "Star Trek - Into Darkness". So they will met each other again in the future.
Heh heh, loved the "I Forgot About Present Company" moment. And gotta love how Holmes didn't even stick around when he didn't think it would be interesting. I wonder what he's going to be up to in the Pokémon universe anyway.
Ominous face, eh? Clearly it wouldn't be fit to introduce Holmes for that brief moment of exposition, now would it?