OK, I'm a slow GM, and I'm worried about the Haarlock trilogy ever showing up in time to play. The only thing I see in the Upcoming section is the Radical's Handbook, which sounds most useful to GMs starting out a new campaign. I'm much more interested in Accention and the rest of the Haarlock adventure.

Just run more adventures of your own creation. It should be easy to scale any upcoming modules to meet your players powers. Or if you're too worried about that just create another group of acolytes under their Inquisitors command. They could play them for a while, and then once the module comes out, thaw out the old characters. Plus it'd be really interesting to have the players hear of their other characters deeds in the whispered rumors of the Inquisition. If you're up for extra awesome you could mix the parties at will to spice them up.