This article doesn't really give a whole lot of information, so I'm taking it with a grain of salt. But I would like to go on record as saying, I think a fifth season of Sherlock is a horrible idea. Not only are Martin Freeman and Benedict Cumberbatch simply too busy to really make a new series work logistically, the end of the fourth season strongly implied an end to the narrative of the show. Trying to take it beyond that ending is ill-advised, in my opinion. I guess we'll see if it ever comes to pass...
Sherlock Season 5 article
I'm a stay-at-home dad, and Director of Music Ministries at a United Methodist Church in Mt. Juliet, TN, and a longtime fan of Mr. Sherlock Holmes.