Well, at least those Depp fans will get the opportunity to see the original series and cast and see what all the hub bub is about.
It would be wonderful if that's what actually happens. And hopefully it will with some. But speaking from personal experience, if I go somewhere expecting something specific only to find out that it isn't happening, I make plans to do other things. For one, NYC beckons. And if I was a Depp fan who solely went to the Fest hoping to get news of the DS film, I'd probably prefer to go off and do something else with my time rather than spend it taking part in events for a show that I may have little knowledge of and no desire to get to know its original stars. Though I may not be a typical case because these days when I go to a Fest I rarely stick around for many of the events - just the ones that I might find particularly interesting (something like the screening of the '04 pilot or one of Darren's NoDS presentations or the appearance of a star I've never seen in person before). I mostly go to Fests nowadays to get together with friends. But one does hope that a good portion of the Depp fans will be curious enough to stick around.
One thing is for sure, though - it'll be very interesting to see what the Depp fans have to say about the Fest once they begin to post on the various Depp boards...