Sherlock - Series 3 Teasing

With several months until even the third series of Sherlock begins filming (due to be starting in January, according to Sue Vertue), some teasing has been made in relation of what to expect for the forthcoming series. Does the words 'bow, rat and wedding' mean anything to  people? If so, there could be a few healthy guesses for what's to come during Series 3. Maybe a giant rat from Sumatra or a marriage for Watson or even a story narrated in the third person but either way, it's still going to be a long wait until Series 3, isn't it?

More Details: http://www.denofgeek.com/tv/sherlock/22452/sherlock-series-3-what-does-the-three-word-tease-mean