There have been rumors of the Endtimes Book III that talk about the Elven armies in Warhammer Fantasy being combined into a single force. While this rumor does not address that, it does say that there will be no Dark Elf models in it. Interesting.......
Please remember that this is a rumor.
via Arthurius11 on Warseer
As usual this is not 100% but I have heard the elves book is going to be called end times : Khaine. Also that there will be no new dark elf models with it. Take that as you will. I personally hope that is wrong or incorrect as I was hoping for new Malekith or morathi models. But leaves door open for other possible elves models / units. We will see as it is still a while away on those ones.