Suffice it to say, you'll just have to TMWFI - but as far as I know, everything I 'release' in these posts is truth, and is what I'm taking into consideration with regards to future advice etc.
The Dark Eldar Codex was finished, sent out to playtesters, and Regional Managers, and rejected, as simply not being powerful enough. I'd have been of the opinion the whole army using a super-Ambush method of Deployment, and having the capacity to squeeze 3 Agonisors and 3 Flamer-type weapons (Destructors?) per 12-man squad would've been plenty. Especially given even befroe the in-progress revamp JetLock armies had "literally no chance" against them...ho-hum. A DEldar list that auto-rapes Eldar? Nasty. Especially since the source also rates Eldar as the highest of the existing Codicies. In fairness, I don't quite agree with that assessment - and the guy ceratinly agrees with my FoC Saturation theory regarding Phil Kelly's writing. ;)
Next, Tyranids in March? New Gaunts box that reduces them to 10-per? Swarm armies stupidly over-powered, just like NidZilla was last time? Tyranids to actually get a reasonable answer to Mech lists? Well, I've been telling you for months that NidZilla is dead, and when the more detailed info for this Codex starts trickling into your brainboxes, you'll agree.
If you don't agree...L2P. Seriously. ;)
Necrons: Everyone's favourite Terminator look-alikes. Well, the Dex was pretty much done, but they were a bit overpriced. 23 points a Necron Warrior? No way. Fortunately, this has been corrected to most people's satisfaction. Dex pretty much in final stages/already done. I have some more detailed info, but it's a lot more fun for me to wait for the rumour threads to start popping up, and then to debunk things I know aren't true. Suffice it to say, given the relative amount I like Heresy compared to other sites, they'll get stuff first, and more. Anyone who copy/pastes my info, please accredit it accordingly.
To summarise then:
Oder release then: Space Wolves, Tyranids, Necrons, then Dark Eldar who have to wait until 2011, BUT they WILL be out. :)
Look out for the next one in this series, in which I discuss changes to the basic rules mechanics being playtested in the Studio, and pick holes. ;)