That is the eight packs that will be firmly 'Pulp-based'.
The other four sets that will be available from the off are Old West themed but could still be used in Pulp games, especially if they are set in the wilder parts of the New World.
First up, the Old West or Victorian Wagon Drivers
Set A
(Contains Prospector, Mexican, Large Gent, Lady and 'Shotgun')
Set B
(Contains Snake Oil Salesman, The Kids, Mum, Dad with Banjo and Undertaker).
As you can see, they will works outside of the Western genre too and would not necessarily need to be perched on a wagon either...
The Pinkertons.

They may be called the Pinkertons but they can pass as any type of more smartly dressed bloke in from late Victorian right up until the Post-War period.
The Cowboys.
Who will also work outside of the local saloon.