Not complicated. It will be Farah if he doubles. The fact that Britain hasn't won any other medals actually helps him in terms of stature and aura.
The opinions about him here or on other time-obsessed forums could not be less relevant.
Wayde really blew it. Not merely by losing the 200 but his attitude a couple of times. He splattered on the track after the 400 with no reason for the crowd or viewers to care about him or want to get to know him, and then today he senselessly responded to Makwala's comment. You've got to be above that, to let it go. Naturally a guy who has excelled all year and is favorite to medal is going to be on tilt and say some weird stuff after being excluded from his best event under bizarre circumstances. Makwala told Lewis Johnson he wanted to fight somebody when he was barred from entering the stadium. That might be a bit of a hint.
If Farah loses then Ayana has opportunity to be the star if she doubles. She benefits from a considerably stronger field than the 10,000 including Obiri claiming she is going for the world record in her own right.
It was right there for Tori Bowie if she had been healthy enough to run the 200, which looks weak. Bowie could have picked up three golds given the relay opportunity.
Stars matter. Swimming picked up Caeleb Dressel this year and particularly last week. Track and field hasn't been so fortunate.