Hold up hit it on the head: money.
Depending on how good the money is, and how badly they need it, none of them will pull out.
I thought that Bolt got 90% of all appearance fees for a meet, leaving little for others.
If that is true, why are Gay and Powell even running? Hmmm...
Maybe they are finally getting tired of the ducking themselves. There comes a time as an athlete where you have to put up or shut up, and you know it. That time used to be Brussels, now it appears to be Stockholm. Good.
I hope that if they all race in Sweden, they will all race again in Belgium. THAT would be the best outcome--a chance for redemption for the 2 losers of race 1, and a chance to cement status for the winner of race 1.
Hey, this just MIGHT be all about athletics at this point. Amazing.
Until one ducks out.