Right now she's a lock for both the 400 and 4x400 with an 80% chance at gold in the latter and as good a chance as anyone to get a medal in the former. The 800 is just a hobby for her at this point.
(She would also be a lock to make the team in the 800. With her new PB in the 400, no woman in world history faster than her in the 800 has a better PB in the 400, and no woman in world history faster than her in the 400 has a better PB in the 800. That includes all the dopers and transgenders).