At this point, I don't think Dre had intentions of ever putting out Detox. Sure, he probably records music, but there's no need in talking about it if the fans don't hear it. Detox just seems like a project to troll the industry at this point.
If it was about sales, he could just throw Eminem on some singles and get a platinum plaque out of it. If it was about building the album around a new artist, he's had 50 (2003), The Game (2005), and Kendrick (2012).