I thought Holm would be next, after Miesha, and after a top 10 win (Jessica Eye? Alexis Davis?).
I feel stylistically and size-wise, and with Greg Jackson's coaching and gameplanning, she could seriously be Ronda's toughest test. Would still like her to have had another quality win before getting the shot, though. If she can be super-patient and listen to Jackson, Holm can maybe, maybe, decision Ronda. Don't go in with the mindset that you have to be really aggressive and "beat" her, like everyone seems to. Just be calm and know that you have five rounds to earn the win, and Holm maybe, maybe, could dethrone Ronda.
That being said, as a Ronda fan, it'd be fun as ever to see her steamroll through another challenger in less than a minute.