Never say never. But Hawaii is sort of a "if you can't make it here, you can't make it anywhere" timeshare destination. And sales have struggled. Simply buying the land in a premier location would cost millions, vs the undeveloped property at WDW and DL which they already own. Then there are added challenges of dealing with local residents and lawmakers, constructing and operating a resort outside of Disney's normal home base. Take all of that into account and it's easy to see why WDW and DL resorts are far more profitable.
Since Aulani's opening, DVC has spent a lot more time promoting exchanges as a way of using points for other locations. Easy to say "look at the hundreds of places you can use your points" without actually diving into how the proverbial sausage is made.
I don't think there will be another off-site DVC unless it's part of some larger Disney hotel project. Years ago Disney had options on property in NYC and DC which could have been a combined hotel + timeshare. The DC location seemed targeted as a sort of Great Wolf Lodge destination property that could have included character meals and modest attractions / recreation / waterpark. But both were abandoned.