Confirmed/leaked:
1. Ossiarch
2. SCE warrior
3. SCE Sarcosanct
4. Fyrslayers
5. Sylvaneth
6. Blades of Khorne
7. Maggotkin of Nurgle
8. Hedonites of Slaanesh
9. Tzeentch acolytes
10. Tzeentch disciples
11. Ogor Mawtribes
12. Skaven
13. Beasts of Chaos
14. STD
15. Seraphon
Bonus: Tyrants and Scions?
https://www.games-workshop.com/en-WW/Warcry-Tome-Of-Champions-EN-2019
https://www.warhammer-community.com/2019/12/03/eightfold-reasons-you-need-the-tome-of-championsgw-homepage-post-3/
I had a wonderful evening reading over the news and theoritising over the list of 15 new warbands that are about to be announced for the 2020.
Anything from all AoS factions in January, to half of that number being new types of Chaos warbands throughout the year really got me excited and I invite you to spend a few days making your predictions on what is coming. For the “Told ya!” purposes of course, and to make the suddenly frozen time go a bit faster
I’m guessing and hoping for AoS heavy list (although I do play Untamed and the old grumbler in me would prefer we stick to inner Chaos dealings). With what was announced they can cover the entire remaining range of AoS in that number 15. All of your ogre, dwarf, aelf, and human prayers answered. Admittedly many of them can be used with the current rules and many other have been masterfully home brewed by the great minds of TGA.