It's not a question if she will be successful or not it's more for her health.

She hasn't stop working since 2005 and before y'all start that "but NORMAL people don't have break" guess what hoes Rihanna isn't a normal person she isn't simply living behind a desk working 8AM-5PM and then gets 7-8hours of sleep.
She travelling, barely sleeping, working irregular hours, jet lagged and being exposed to new disease her immune system isn't use too battling a COMPLETELY different story.
Plus it's better for her career of the long term and y'all hoes acting as if she would fall off the face of the earth. We still got endorsement, features and movies coming up.