It's the same story on both sides, three strong choices then a sizable dropoff in talent. These would be:
Hall, Ritz, Meb
Desi, Kara, Shalane
I'm not sure on the order for the women, but I'm confident that this is going to be the team. If those three show up healthy, which is a good bet, any other woman making the team would be a HUGE upset.
For the men, the biggest question mark would be Ritz and his ability to show up healthy. I think the marathon is the wrong event for him (look at how his marathon career stacks up to those with similar track PRs), but he's still better than all the other guys that aren't Meb and Hall. I think Hall will win with relative ease, and I'm not sure who will take second. Anyone else making the team would be an upset, but not as big as on the women's side of things. The only wrinkle in the equation would be Rupp. If he enters it would not be an upset for him to make the team or even win, although who knows. He might be even worse than Ritz at the marathon. We don't know. Anyone know if Wesley Korir is an American yet?
Since the thread is asking for top 5 I will say Arcinaga, Hartmann, Boulet, and Rothstein come up just short. But I have no confidence in these picks.