Hypothetically speaking, if the race is fast from the gun, the top guys could run 27' at 10k, meaning a 28:00 or better would needed to be done before getting lapped.
The low 27' guys would seriously start to hurt by 15k, bringing the split to 42:00. Wilson, Kipchoge, Mo, Kimetto, Mutai are still around.
The HM split could be around 59:30, I'd think there be a bit more sitting at this point.
Then, who ever can run 1:28:00 or better would probably win. Kimetto has a ridiculous 25K time, so he would be a top contender. Kipchoge has the speed, Kipsang is always strong, and Mo would have his wheels fall off.
The final distance would probably be around 28-30k at sub 2HR pace. Winner - Kimetto. 2:02:58 + 1:11:18, on his best day I have him over Kipchoge.