The cat is out of the bag now, and we can see for the first time some structure revealed for how we will be fielding our Eldar in the near future. Leaks and readers with this weekend's White Dwarf already in hand are talking and here is what they are saying.
please note that these are still before an official release, and can contain errors. I cleaned this up a little as well to help make it easier to read.
via an anonymous sources on Faeit 212
Eldar are divided into three types of detachments- Core, Auxiliary, and Command.
Here they are.
Core: Guardian Hosts 1-3
Guardian Battlehost
1 farseer
3 guardian defenders
1 vyper squadron
1 war walkers
1 vauls wrath support battery
0-1 warlock conclave
Windrider Host
1 farseer
1 warlock conclave
3 windriders
1 vyper squadron
Guardian Stormhost
1 farseer
3 storm guardians
1 vyper squadron
1 war walkers
1 vaul's wrath support battery
0-1 warlock conclave
Command: Regents of the Warhost 0-3 per Guardian Host
Heroes of the craftworld
1 autarch, prince yriel, eldrad or illic nightspear
Seer Council
2 farseers
1 warlock council
Living Legends
1 avatar, Jain Zar, Asurmen, Karandras, Fuegan, Baharroth, or Maugan Ra
Auxiliary (1-12 per Guardian Host)
Outcasts
1 Rangers
Crimson Death
3 Crimson Hunters
Aspect Host
3 Dire Avengers, Howling Banshees, Striking Scorpions, Fire Dragons, Swooping Hawks, Dark Reapers, Warp Spiders or Shining Spears, in any combination
Dire Avenger Shrine
3 Dire Avengers
Wraith Constructs
1 Hemlock Wraith fighter, wraithlord, or wraithknight
Wraith Host
1 spiritseer
3 wraithguard or wraithblades in any combination
1 wraithlord
1 wraithknight
Engines of Vaul
1 night spinner,
1 fire prism, or
1 falcon
