Only if your RCI resort allows II trades. If your timeshare allows Interval exchanges it's possible, but unlikely. It might be a bit easier if your resort was one on the DVC exchange list, but my guess is that is not the case.
RCI points may be used for a variety of non-timeshare options - but I'm not sure that any of the WDW resorts are one of those options.
RCI members cannot exchange directly into DVC resorts as DVC currently works only with Interval International (II). Originally, DVC's World Passport Collection did use RCI as the exchange partner, but that was changed to II over 10 years ago.