From what I can get from the Rieti meeting site, Gatlin, Powell, Lemaitre, and Carter will all be in the men's 100m.
They always throw in a couple of Italian guys, maybe Collio will run again.
This will be a great match-up, especially if they have adjacent lanes, Gatlin, Powell, and Carter--all excellent starters and excellent first 30m, we might see something special if conditions allow. Plus there is that Rieti timing...
Meet will be on Sunday, I will post the startlist when I can find it.