This is from Eblis_Dead_Forever on Warseer..
Yes this is one of those a friend was told this by someone that works at GW things. So feel free to take it with a pinch of salt as I am not sold on it myself. But never the less I thought that it was worth passing on, as it is quiet interesting.
Apparently the Dark Eldar might be out next year as there is a gap in the release schedule, I was told this would be round the middle of next year. Like I said I'm not convinced as the Dark Angels are due as well as the Orks next year, which would the two 40k codexs we usually get in a year.
GW did actually consider dropping the Dark Eldar but because of the amount of support for them as a race they have decided to keep them. The range is being reworked by the guys that did the wood elf and eldar models
The Warriors are being completely overhauled, think of the new eldar models in chaos armour. I was told that these got passed round all the GW staff and that they are very impressive. The logic behind the new look is that Commorragh was indeed destroyed during the Eye of Terror and these are a new sect of Dark Eldar.
Scrouges, Grotesques, Mandrakes are being redone completely.
Wyches and Hellions are staying the same with more models being added.
Reavers as are the Haemonculus stayin the same as there is alot of support for the models.
New Dark Eldar Lord models.
Lelith will get a new model, Drazhar is staying and Kruellagh is being replaced by a new special character.
Incubi, the Raiders, the warp beasts and the Ravagers are unknown if they will change or not.
Didn't hear anything about new units or changes to the rules.
Like I said I'm not sure how much if any of this is actually true or not but I guess time will tell.