I guarantee you the other 2 men are going to move up to 1500m. Hassan is done with 1500m, and Muir appears to be making that move as well. I imagine Faith will make the jump, too.
5000m is about to be loaded as hell: Dibaba- Ayana- Obiri- Hassan- Muir- Faith - Gidey
We are going to have 2 men's 1500m divisions!