uh
the great london fire was in 1666. so it's impossible for pyro to have caused it
also, that street is the same street sherlock holmes lives on. baker street. however we still don't know if this has any correlation.
The pre-update was sherlocky themed. That picture has been existing.
To the people who say "No don't reveal his identity";
If they don't reveal his identity then they'd better NOT(as in lack of) reveal it in an interesting and satisfying way that doesn't leave people feeling empty and sad. Seriously it IS one of the biggest mysteries and it must be solved