For what it is worth, the TVTOME website predicts that Dark Shadows will make the WB's fall schedule.
What's most interesting about their picks is that they fly in the face of the "conventional wisdom" that the WB will only schedule two new dramas - they've picked three (DS, LIS and Podigy (not Jack and Bobby)).
I think DS and Charmed will compliment each other pretty well.
And also for what it's worth, the schedule they've come up with is definitely thinking like a network programmer because, not only would Charmed/DS and Smallville/LIS compliment each other, but so would moving One Tree Hill after 7th Heaven and placing the new drama Prodigy after Gilmore Girls. But personally I'd hate to see a WB DS on at 9pm on Sundays because that's a killer time slot
in which even a show like Angel, which was an already established series with a wide (for the WB) fan base, struggled when it was there in 2001-2002. A WB DS, like this season's WB Tarzan, would be a brand new show - and trying to establish a new scripted drama there is going to be very, very hard - just look at what happened to Tarzan. The only thing that seems to do well there is reality type programming like High School Reunion and Surreal Life. Though, of course, the WB isn't going to ask for my opinion.