I feel that lately Rihanna has been in very similar situation like Lady Gaga was in 2012-13. She took a long break after an extremely mediocre era, which hadn't pleased the general public much. It had only 2 hits and actually it seemed that Rihanna didn't even care. Her social power is fading (just like was Gaga's before 'ARTPOP'). Both Eminem and Shakira took her Facebook crown, Youtube account got overtaken by some comedy channel, Instagram was deleted and Twitter followers are not growing really fast compared to other celebrities. Also, let's not forget Billboard's Social chart, where Rihanna is at the bottom of the list (below many irrelevant and currently inactive people).
So what do you think? Personally, I believe that social stats are really reliable indicators in order to predict the future era by an artist. Another important thing is a serious competition. Other than Queen B's comeback, the industry has been taken by many new girls including Rita Ora, Iggy, Tinashe. And most importantly, both Taylor Swift and Adele are making their comebacks later this year. Is Rihanna save?