Hmmm. . . :-
The only resorts currently under or slated for construction at WDW are two new DVC properties; the Saratoga Springs Resort and Spa, which occupies the old Disney Institute location, and a yet to be named Golf Resort to be located at the Eagle Pines golf course. Both of these sites are far removed from the existing monorail lines so it doesn't look like either would have a monorail station. Shades of Green is still under refurbishment and its December 2003 reopening date has been pushed back to March 2004; the Pop Century resort, scheduled to open this December, has been completed for quite some time but not opened due to soft bookings for the entire WDW resort area this past year. These resorts, too, are not exceptionally close to the existing monorail lines so I would not expect them to have stations, either.
That said, we can only hope that a brand new resort is in the works for the Magic Kingdom area and will bring with it a new loop. I, for one, am always looking to find and hear new resorst loops! It's the *music* that makes the magic.