Yes she was supposed to be next. She dropped singles and especially albums that flopped and they got her back there releasing an album the next year.
Not to mention they spent big money on securing her hits:
However, since it was the
Grammy season of 2007, Stewart and Nash eyed American R&B singer
Mary J. Blige for the demo.
[3] Upon calling them to set the record aside for Rihanna, Stewart had played it to an associate of Blige, subsequently promising the song to her. Having heard the move of the writers, Kwak began calling Stewart and his manager, Mark Stewart, incessantly. Meanwhile, considering Blige's nominations at the Grammys, Stewart and Nash agreed to wait for her response. However, Blige failed to hear the song in full due to her obligations to the Grammys at the time and "had to sign off on the record before her reps could accept it".
[3][5] Finally, Reid "stepped in, trading on his power-broker status and longstanding relationship with Stewart", and admits, "I made the producers an offer they couldn't refuse."
[1] By the time Reid had successfully persuaded Stewart's camp, they "just couldn't say no".
[3] On giving up the record to Reid's camp, Mark Stewart comments, "We knew Rihanna's album would be out in a few months. Mary wasn't even in an album cycle yet. We made the sensible business decision."
[1]