I think Def Jam should just drop Rated R already, they screwed the era enough with releasing R101 and Te Amo as final singles.
They should just let the Eminem and possibly Jay-Z singles keep Rihanna in the minds while she quietly works on her new album and then hype it up in October-November, and release the album in December.
I feel like this will be a TFM type re release. It seems like she has been working with tons of producers in the past few months and I'm sure she has recorded several songs.