In fairness, Bailey wasn't properly set up on that relay - he didn't even make the individual 400m team indoors and he was put up against the indoor 400m world champion.
That said, I have to imagine Rai is gonna be on the anchor. There are multiple teams within striking distance of the US in the 4x400 and the relay coaches will want the strongest runner possible on that anchor
If Rai runs 46 low or faster for his event, he will be the anchor for the 4x4. The question mark is what happens with the 3 entrants of the 400. Will any become the clear weak link or will they all perform? If one stumbles (44 high or 45 low)I can see the composition of the team becoming more difficult to decide. However, if they all perform, most likely we will have the 3 of the 400flat+Rai for the 4x4 final.
IMO here's the order of things for the 4x400 final:
1. Anyone from the individual 4x400 squad who who gets into the final will be on it
2. Rai if he doesn't pull up injured
3. Norwood
4. Quincy Wilson
5. Anyone else (relay pool, - i'm looking at you, bryce deadmon, and anyone from the open 400 that doesn't make the final)
Rai is just a clear pick and has been on the relay many many times. Norwood runs 44.1, is heavily experienced, and has good political pull, and Quincy Wilson on the 4x400 is a good PR move.
I have no doubt that Wilson will either be on the 4x400 prelims or mixed 4x400.