So lets take a look at that 2nd wave Dark Eldar list again:
-Talos/Cronos plastic kit
-Venom plastic kit
-Voidraven/Razorwing plastic kit
-Scourges plastic kit

With Jes saying all of the Dark Eldar range minus a few special characters would be out by June, that would leave the following as metal kits:

-Grotesques
-Wracks
-Haemonculi
-Assorted Characters

Schedule wise, if this pans out, it would mean a shoehorn slot pushing back Grey Knights to perhaps the May timeframe as January-March are already known.