No WR in London, not the fastest course and 2:00:35 is... well, Sawe and Kiplimo have not even broke 2:02 If Kiplimo improves the 2:01:25 from Kiptum, that would be a statement. I hope Kiplimo runs Berlin or Valencia later this year. I can see a WR there. Chicago is a coin toss, a rainy or windy day and f- your time expectations.
Weather will play a factor. I think it clearly comes down to Sawe vs Kiplimo. I think if race situation plays out right, Cheptegei will definitely help Kiplimo as fellow Ugandans. And Kejelcha is definitely a wildcard - he may surprise everyone because he is so experienced as a runner and always puts out total effort.