Talked to Jim Bailey over email a couple of weeks ago, he said that the demand for Incursion stuff had pretty much dried up. I also mentioned the lack of SoTR games played by myself and others recently and he thought Dust Tactics would suck up most of the Weird WW2 gaming. I wasn't too sure, i still think "skirmish" sized games are having an upswing and outnumber the larger games.
Jim said there were no real plans for new stuff for Incursion, he had ideas for other projects but nothing immediate. It's too bad since Grindhouse Games are great guys and deserve better, but both Jim and John seem to have been caught up with real life stuff.