I seem to recall a strong rumor from a few years back that said that RF was being strongly considered for SDC, but like many things that were considered around that time it seems to have been put off/delayed/abandoned. In a package deal, it wouldn't be a terrible addition. It's about as unimaginative as a ride can get, and of course we only want SDC to pursue the best ride concepts around, but it would help the crowds on hot days.