The consensus seems to be that Aulani (Hawaii) will be a barometer for future off-site developments. Getting members to stay at a new location is secondary to actually marketing the ownership. Before Disney would build a 300 room timeshare in San Diego, they need to know that there is a market for people to
buy there.
You might like the idea of staying in San Diego but, to be blunt, would you paid $120 per point to OWN there? Can you find about 10,000 other people who would?
Disney is so synonymous with the theme parks that they are facing an uphill battle trying to convince people to buy their off-site product rather than a more diverse timeshare system like Marriott, Wyndham or Bluegreen.
Since you're a newer owner, it may help to know that Vero and Hilton Head were the 2nd and 3rd resorts to be constructed (after Old Key West.) This was back in 1995/96. Management was working under the assumption that they could slap the "Disney" name on anything and buyers would materialize.
While Vero and HHI are cherished resorts to many, they were a failure in terms of their overall sales levels. The Vero resort was actually intended to be twice as big as it is, but slow sales prompted Disney to sell off a neighboring plot of land.
Over the next 15 years,
DVC was linked to projects in Times Square, Colorado and a location about 45 minutes from
Disneyland in CA (exact location escapes me), among others. None of them happened, obviously.
Disney purchased land outside of Washington DC a couple years ago and has yet to move forward with any project. If they do develop the site, it seems a given that DVC villas will be included. That's your current best bet for another non-park DVC resort.
At any given time there are a half-dozen rumors involving sites at Walt Disney World and there has been talk of a 4th tower being built at DL's Disneyland Hotel which would house some DVC units. Those locations, plus DC, are the most likely projects over the next decade.
But as for non-Park locations, it all goes back to Aulani. Keep your fingers crossed for brisk sales. The Japan earthquakes certainly did not help any. If Disney cannot sell a non-park resort in Hawaii, I can't see them taking many risks elsewhere. Land is expensive (as compared to the parks where they already own land.) Building is expensive. Marketing costs are expensive. They won't haphazardly dive into projects unless they make financial sense, and a large part of that is selling all of the points in a reasonable timeframe.