Yep, there will be 2 new professions so far. First is going to be the Engineer that I'll have PDF rules for soon, once Doc Lloyd is all done. With the expansion if you don't want to play the monsters you can still do the same old gangfights as always. We'll add a Monster Hunter profession and there will be some new guns added too, some made-up special guns for Engineers too like a gatling rifle or hand cannon that's basically a shotgun pistol.
When the time comes I'll update the PDF rules, and also make a PDF with just the new stuff listed for people who have the printed book. I'll probably be posting the PDF rules for the gatling guns in the next week or so, I was waiting till I had some painted photos to add to it