The idea of sort of "mini-series" podcasts like that might appeal to both listeners and DIF. Do however many episodes until you've exhausted the subject, then stop. In a way, they'll be more "timeless" than the current movie episodes, the kind of thing that will pop up in searches and bring new people to DIF as time passes.

As for possible subjects, I would love talk on the tradeoff between historical accuracy, and... well, being good Use A Bridge Too Far as an example, as I need to know what the hell isn't working...

Huh....can't say I'm not intrigued by the idea.  I've been trying to develop an MMA podcast for almost a year that is mainly war stories from the dark days of the sport.  I had though of incorporating fighting movie talk, but that's not what that is about.  But this...hmmm...let me think on this for a moment.

If this included discussion of stunt and pyro work, I'd be pretty damn happy.