"On paper, this isn't a race; it's a coronation."
I agree that the race is a coronation on paper. However, let's consider that Genzebe has NEVER timed her cycle properly (doping cycle and/or training cycle, whatever...).
2012 - 4:00 indoors. This was equal to the world leader from all of 2011. She then opened her outdoor season with a 3:57. At the Olympics, she supposedly suffered an injury and performed terribly.
2013 - 4:00 indoors. She opened her outdoor season with a 3:57 (sound familair?). Wound up 8th in the World Championship 1500m. She finished two tenths behind Zoe Buckman (4:04.8 PR at that time).
2014 - 3:55 indoors. 8:16 indoors. To open her outdoor season, she finished 6th in the Doha 3000m (5 seconds behind the leaders). At the African Championships, Ayana destroyed her by 10 seconds over 5000m.
The 2013 WC race gives me hope. She was beaten by Buckman who (at that time) had a PR 7 seconds slower than hers. 3:50 + 7 = 3:57. This puts Rowbury and Simpson in the mix. I am not saying I think it will happen, but Dibaba is not exactly a "gamer" when it comes to the big stage.