Sword of Spirit
Legend
You might have failed a perception (or investigation) check, because Angels are actually in the table of contents.
The Angels entry isn't long enough to include them. There are 7 traditional species of each, for a total of 21. That's probably going to be over 20 pages looking at how things are statted out so far. The angels covers pages 15-19, and includes devas (p. 16), planetar (p.17), and solar (p. 18). Unfortunately, it looks like deva isn't big enough to include astral, movanic, monadic, and the other one whose name I don't remember.
There are no guardinals, eladrin, or archons anywhere.
James Wyatt talked about a lot more outsiders and exemplars in his articles (as well as other miscellaneous creatures, such as various fey) than we are seeing. Hopefully this means that they will be "coming soon to a supplement near you", rather than meaning that they are going to trickle out piecemeal over the course of the next 8 years like they did in 3e.