If you grew up in the New Orleans area and are a certain age, you may understand. D.H. Holmes was a popular department store when I was young -- in fact, it was a small chain that had stores in a number of Southern cities. The most famous D.H. Holmes was on Canal Street, where Ignatius Reilly waited under the Holmes clock in the novel A Confederacy of Dunces. Dillard's bought the department-store chain awhile ago, and the store on Canal is now a swanky hotel (they kept the clock, though).
Yes, but what does this have to do with Sherlock Holmes? Elementary, my dear Watson -- the fonts used in the movie posters are remarkably similar to the wide serif fonts used by D.H. Holmes in its later years. Let's have a closer look.
Here's a closer look at the font from the character poster -- the same font used in other posters for the film:
And here is an old D.H. Holmes sign, from a store in Pensacola, as found on a website about a Florida gardener's greenhouse:
Here's another example of the D.H. Holmes logo, from a website that sells bottlecap fridge magnets adorned with old New Orleans store and sign logos (which look pretty cool, I might add):
Do you see what I mean? I grew up with that font on D.H. Holmes shopping bags and mall stores -- pronounced "Homeses" by many New Orleanians -- and it took me aback to see it on the Sherlock Holmes posters. It can only be a coincidence, but I have to wonder if I'm the only person from New Orleans who made this connection? Am I stretching the similarity too far? Maybe so, but now I expect Robert Downey, Jr. to talk with a Y'at accent and stride down Canal Street, arresting Ignatius Reilly as a suspicious character. Yikes.