According to allmusic.com http://www.allmusic.com/c...90s31qa3bg the new The Very Best of Prince compilation will be released on Rhino. The site lists 74272 as the catalog number for the release.

Rhino has a long history of handling special releases with very effective marketing techniques. It should also be quite interesting to see what the packaging looks like as the label typically does a great job with that as well.