How to do a Doctor Who/Sherlock Crossover (Wholock)

Many fans of Doctor Who and Sherlock fantasize about a crossover of the two beloved television series. These fantasies range from having a G rating to those of a much more adult nature. While I have been known to indulge in the latter, it is not the sort of fanfiction that will be discussed in this article. This hypothetical mashup is referred to as Wholock. Even the current puppetmaster of the two shows, Steven Moffat, thinks that it's a fun idea. While we all know that the chances of such a fanfiction-esque presentation are slim to none, I have spent a decent amount of time dreaming up a couple of valid ways to make it so.

Idea #1:

Since they've already established Sherlock Holmes to be a fictional literary character in the Whoniverse, it seems impossible that Doctor Who and Sherlock could ever do a crossover. It would be possible, however, if they made Sherlock a show in the Whoniverse. They could then make Sherlock a holodeck-type character, much like what they did with Moriarty on Star Trek: The Next Generation (with bonus points if they make an uber meta reference about ST:TNG). It would also be cool if they mentioned the Doctor Who episode "Silence in the Library."

Idea #2:

My second idea involves both time travel and an alternate universe. Ideally, Sherlock Holmes would reside in the universe in which the Meta-Crisis Doctor and Rose are living. Someone from the current Doctor's universe could go over to Meta's universe and observe and/or interact with Sherlock. They could then return to our universe, before the time in which the Sherlock Holmes novels were written, and regale Sir Arthur Conan Doyle with these tales, thus inspiring him to write the series. Perhaps the travelers could even be Vastra, Jenny, and/or Strax. The icing on the cake with this concept would be that we could actually see David Tennant, Billie Piper, and crew.

I am obviously hoping that these ideas are seen by the proper eyes and put into production (perhaps leading to my hiring as a permanent writer for one or both shows), but am not holding my breath any more than I am for the... intimate... details that I would like to see included. Torchwood, you are sorely missed.