Haven't seen this on here yet so thought I'd post it, Beasts of War have announced the Necron 2nd wave release date
said to be 5th May and has a sketch of the Triarch Stalker and what will be included in the 2nd wave which is:

Our information suggests that the release will include the:

Triarch Stalker
Tomb Blade
Canoptek Wraith
Canoptek Spyder
Nemesor Zahndrekh
Vargard Obyron
Illuminor Szeras
Destroyer Lord Upgrade Pack
Heavy Destroyer Upgrade Pack