Yes, now that "Scottiarty" is dead (Moffat and Gatiss confirmed it at Comic Con, though I'm still a little skeptical (Rule #1 of Fandoms: The Writers Lie)) there's a open position for "Nemesis for Cumberlock" over on BBC's Sherlock. And now we got an applicant!
Ladies and gentlemen, I present: Charles Augustus Magnussen!
Yes, he's obviously supposed to be "Charles Augstus Milverton" (don't ask me why they changed the name), the antagonist from the short story he shares a name with in the canon. He was a blackmailer of women. The character recently (briefly) appeared in the Elementary episode "Dead Man's Switch" (you can see my review here). Yeah, I'll probably end up comparing the two when I inevitably review whatever episode he's in.
Interestingly, he played by Lars Mikkelsen. If you're not familiar with him (I'm not), than you may be familiar with his brother, Mads Mikkelsen. He (the brother) plays the titular character on Hannibal. (He was also in Casino Royale, but I only really care about the other role... ;P) *Ahem* Said it before and I'll say it again: Everything I Love Connects To Sherlock Holmes (Six Degrees of Sherlock Holmes) (It's only a matter of time, Supernatural.).
I'm excited. In Milverton's story, Sherlock is pushed into doing questionable things. It'll be interesting to see if the same happens here. I can't wait. And I'm sure Lars Mikkelsen will do fantastic as Charles Augustus Magnussen, the character will no doubt be another fantastic addition to the cast.
So long as he doesn't make Hugh Dancy cry, we're good! ;)