Eldar mid to late 2012. Possibly 1st or 2nd official 6 ed codex
Guardians being redone. Will include new weapons platform and storm guardian bits.
Avatar getting new fine cast version with weapon options (spear/sword) not as big as FW model, but larger than current.
Lots of new mech options. Jump pack/jet options for walkers similar to new FW models, but unclear if this is new model or upgrade to current model. Upgrade packs don't seem likely, and current model is decent, so I have my doubts about this rumor completely.
New tank options...built on wave serpent/falcon chassis still. Hydra like flak turret, Bonuses against flyers and skimmers. Dcannon tank. And some pulse cannon monster tank...scorpion?
New jet bikes and vypers.
New warlock sculpts.
New aspect sculpts, aspects still likely fine cast.
Some sort of shimmershield device. Portable cover save for a unit, but static once deployed...model in design for it. Sounds fishy to me? But the de have the portal...who knows, I say unlikely.
From obvious dept comes the nightwing and some form of bomber. Neither look at all like de ships, or existing FW. Definitely eldar.
Drop pod of some sort that can carry 20 troops, 10 wraith guard, or 1 wraith lord. Deploys as firebase that has higher cover rating for guardians. Sounds like a bastion that drops into play with a weapons platform attached. Not sure I buy into this rumor completely, it seems too complex the way it's been described. And I never saw any evidence of this in design before.
Cheers. Still super long off, though. Have your salt handy.